Whether Air Midwest will still be direct hiring in May or June - no way to know. It all depends on how soon the current FOs leave the company - I think the average life expectancy of an FO here is about 6 months - by then they've acquired the minimums to leave for another regional or they're upgraded to 1st yr CA. If that continues to happen, then Air Midwest will still need more FOs.

Personally I think spending the money on your instructor certificates would be more beneficial to you than spending the same amount of money for PACE, because at least instructing you're keeping your options open and have a shot at going to a good quality regional that you can stand working at for 4-8 years, whereas PACE you're left with just Mesa and an expensive student loan.

If Air Midwest is still doing direct hiring of its own in May or June, you might want to consider that to get you to Skywest. Don't forget to factor the time you will need to spend at Air Midwest to get the flight time to work for another regional. Lots of things can happen during that time frame.