[lateapex911]

wow...50 x 20. Druel druel! I am dieing to add 10' to my 22 x22!

I think the design depends on what you'll be doing. If you're planning full restorations, or fabrications, or storage??

I'd consider having dedicated areas. Maybe build a small storage room at the back, with a door, just to put the bigger parts, the engine stands, lifts, etc.. And I'd also consider a tool room for the messier fabrication tools. Saws, drill presses, mills, any grinding or fibreglassing work could be done in there, and the dust will be controlled, along with the noise.

By all means don't waste the upper space above the ceiling. Dedicate one area up there to the compressor. It's a bit of a pain to get it up there, but it's out of the way, and you will hardly hear it running. And I'd try to make some shelving up there for smaller parts.

Also, either install or plan AC if you want to get work done in the summer!