The answer to your question is a big "it f%ckin depends". The availability of man days varies from unit to unit. Factors that play into your paycheck as a bum/trougher are the type of airframe, the general ops tempo of the individual unit, as well as the number of co's/wingmen doing the exact same thing you're doing when you get there.
In general I would say you will fare well in the 135. Heavy units tend to have a healthier allocation of man days than the fighter types. As it pertains to the seasoning period (which are active duty days), it is my understanding that it used to be quite healthy, circa a year. From talking to other guard guys the number now varies. Some expect 30-45 days (myself included), others have 270 days, others a year. The longer periods tend to be quoted by the fighter guys in my recent epxerience asking this. Again, your individual unit will be the one to definitively answer that one.
Now regarding pay once back in traditional status. The guarantee is 48 pay periods for UTAs (12 drills @ 4 pay periods per), 48 AFTP and your 14 AT days (15 for Guard...the f%ck I know why one day more..) Clearly this amount to roughly 9Kish for 2LT rate and clearly not enough to live on. I don't think your unit is going to set you up for that kind of expectation. You WILL make more than that. How much more depends on the factors I stated above. For 135 guys I would venture to say the biggest factor is how many other co's bumming at the time of your arrival. If you're one of the few, then there should be enough work to enable you not to have a second job. If there's a lot like you then yeah the pickings will be slim. At least you're not in a fighter unit, I would venture to say that it is a little more difficult to pick up man days in a fighter unit, plus you have to actually fly twice in one day to "double teep" (toungue n' cheek guys...:) ) that's Guard for burning two pay periods in one calendar day.
At any rate, as you can see things can vary a lot. I would ask your Capt types in your unit, they're right in the thick of it and would be able to answer you fully without much reservation. I've heard of people accruing roughly 300 pay periods calling it a good year, on 2LT that's 25-27K, 1LT about 35K etc..and I think I might be low-balling the math as I don't know if I've figured the pay fractions fully. Anyways, that's like 4 man days a week averaged out.....which is a healthy amount. The Guard/Reserves (in my short experience so far) takes care of its own, you should have no problem finding work as a new co. Now, how much pay also depends on your expectations. Are you going to make 60K? I don't think so. Could you? Maybe, but at least I'm not banking on it. Are you going to make 12K? No, you're not. You'll make anywhere above 30K. Guys in my unit have made 45K the first year, it is my expectation to make a similar amount and I've been told by folks in my unit to not expect to have a second job. PROVIDED you don't have much competition from other co's in the bumming dept I also expect you to pull upwards of 35-40K your first year.
After the first year things get better, the whole issue for the new guy is the 2LT pay rate, once you go up in rank the pay periods become more valuable and making your income target becomes easier.
The other thing that I think you have going on in your favor is the fact that you're brand new. The unit's expectation is to have you available and working the line much more so than the seasoned guys. Most guys I know going thru training right now are all expected to be local, and so was I. So clearly there is the notion that the unit wants you and needs you there to do the one job you're supposed to be doing as a fresh co/wingman...to become proficient in your jet. I think the naysayers come with a little negative transfer from the shut up and color attitude presented to the active duty LTs, but I digress. My point is that I don't see your unit forcing you to min run as a NEW guy, which would necessitate a civilian job right off the start (the scenario Rainman alluded to). The unit expects you to be there almost full time the first year.
Regarding civilian employers, once again, odds are you're better off bumming/troughing. Once you take a peek at the civilian employers you will quickly discover that aside from an airline gig, the schedules just don't jive. It is very difficult for a brand new guy to fulfill the additional commitment that entails being new at that unit and maintain the 9-5. The unit (should) understands this, which is why so many of us are "encouraged" to be locals. As I said before, all the guys going thru training with me right now are going to be locals, pretty much as condition of employment. That's not a coincidence. You WILL be flying more your first year than the average O-5 in the unit, guy who mind you, can make the same coin as you in the fraction of the pay periods. So you see there is a method to this madness after all.
So let's say you're thinking on going to the regionals as a way to cover your livelihood. Chances are you WILL make more bumming than on first year FO pay. That means your opportunity cost is better to stay at the unit (and stay in town) all week than commute to sit reserve and make sh%t while the neighbor takes care of your wife/gf all week. Hell, on the -135 you are likely to match or exceed the yearly flying hours that you would on a regional, which even as SIC time it sure as hell looks better than RJ time anyways.(and the only airline that cares about 121 time notes military time in lieu of 121 so there ya go) You could even go and get hired at the regional and then go on leave as much as possible, I consider that somewhat of a dick move to your FO bretheren, and would have a hard time keeping a straight face about it, but it is an option to deal with the only hit you might be taking, which is the health care issue. So I see little reason for you to actually need a second job, other than you want a lavish lifestyle and/or already have 3-4 kids and have no choice but to suck it up chase as much coin as you can.
Once you're a CAPT, and AC on that big ol'jet then your options and pay issues become exponetially alleviated. I still find it a great opportunity to have the priviledge to serve in the Guard/Reserves and most of the flak you'll catch from the AD types (the ones who object to bumming I'm referring to ONLY btw), while mostly consisting of the Guard baby name-calling and constant references to your canned training missions, have more to do with the fact that they wished they would have done their homework on the ANG/AFR a little earlier. TC :)
My purely speculative $2.75 on the matter.
Good luck brother