RE: Workbench for Jets
I use standard 6 or 8 foot folding tables and then also have used a pvc jet holding stand (inch and a half for sturdy) see pictures of my other threads related to the isobar build.
Also, once you're in the late stages you can use todd's jet paint stand (eurofigter is the best on it so far in my experiance).
My garage has full kitchen cabinetry around 12 lf worth. Gives me bunch of drawers, cabinets etc. lots of places to put stuff. I have base cabinets and overhead cabinets.
I also have overhead compressed air and overhead electrical both on reels. Very very handy.
Have fun,
Sean