re: ideas for outfitting my shop

Metal work doesn't require that much space unless you're planning on doing large projects. Buy a stick of 4x4x1/4 square tube, a stick of 4x4x1/4 angle, 4x8 sheet of grating and four heavy duty casters and build a welding table. You can roll it in and out as needed.

Woodworking needs room.
Table saw needs 10' in front and at least 8' in back with minimum 4' on either side.
Miter saw need at least 8' on either side (preferably 12' on one side)
Router table is about the same as miter saw
Need an assembly table at least 4x8' with a thick smooth flat top (make drawers for the bottom to store assembly tools and clamps)
A nice size tool chest preferably with a work top
Cabinets everywhere

Build an A frame on casters with a chain hoist for picking up, unloading, etc.

Build another building for storage. If you give your wife a section in your shop for storage, that section will grow and end up being a place to put stuff that should just be thrown away.

Congrats, I've got some serious jealousy right now.