Don't be afraid to go to a heavy unit. If you get hired at an airline you can go to training and complete IOE and then take mil leave to train on your new mil aircraft. That way you make a good living the first year at the airline. After 1 year is up you can return to the airline on year 2 pay, but will still be on probation, which is no big deal if you show up to work on time.
You should be able to swing 4-5 days a month in the unit. If you get hired by SWA you'll probably not want to add to time away from home doing the USAFR. You should consider a non-flying IMA, ALO, or CAP job just to complete your 20 years. That way you avoid the AF BS, whisch is a lot less in the USAFR anyways.