Over this past weekend, I bought the cheap Lowes 99 buck special, Porter Cable 2 gal. compressor and a brad/staple gun. I cut and assembled about a hundred frames, 7 sbb and 7 inner covers, 7 outer covers. I also used it to build a frame assembly jig which lets me glue and nail 10 frames in just a couple of minutes.
This cheap set won't last forever of course but if it dies tomorrow, it has already paid for itself in the time saved.
(I'm using regular old Titebond glue (with no number) since Lowes had it on sale a couple years ago for next to nothing so I bought gallons of it.)
Wayne