Based upon my vicarious experience with a 40x60 foot shop upgraded from a 30x48 shop. And now my own 24x12 shop (yes it is way to small, long story).
1. Outlets, you can never have enough, all boxes double for 110V (4 plugs), every 4 feet, and same interval for 220V as for 110v. Plan for more electrical load that you need.
2. Eight inch floor thickness, that way you always have a strong enough floor for lifts, etc.
3. An overhead travel crane is best, but an I beam running the width of the shop works with a gantry crane.
4. One bay 14' high, with a high overhead door for the car lift. That area needs to be at least 14' wide so you can walk around the vehicle while it is on the lift, especially if it is low enough you cannot walk under it.
5. Three phase power if at all possible, otherwise a 3 phase converter.
6. Mezzanine or separate storage area.
7. Must have a bathroom (sink and toilet mandatory, shower nice to have).
8. Refrigerator mandatory (not a little one)
9. 2x12 base board to stop heavy tool chests etc.
10. Lots of lights, more than you think you need.
11. Tall roll up doors - at least 10' wide if not double wide
12. Drain to the doors, but with a good flat area for machine tools.
13. Bigger than you think you need by at least 50%.