Voski-
I've been an aptap'er for years as well. I must reiterate the C-12 encouragement. It's the way to get yourself exactly what you need. I was a Navy C-12 guy way back, but it is what opened all sorts of doors for me. Once you are flying it, be sure to get designated as an IP (even if at the very end of your time flying the C-12) as that will qualify you to take the MCI exam - FAA military competency for CFI and CFII. I got my CFI for rotorcraft and AMEL just by taking the MCI exam. Great resume fodder.
Anyhow, go do the C-12 gig and enjoy being paid much better for getting the same experience. No reason to get FW multi time on the outside when you can get it with Uncle Sam.
Just my two cents...
Good luck!