Some place like this would be ideal:
http://www.thestablesaz.com/
(But not as obviously geared towards the super rich)
I'm also looking for somewhere to store and work on a car that is reasonably secure to avoid the HOA blues. I know K&E offers car storage but I'm sure they would frown on trying to work on something like a rally car next to a 250GTO... I've done the 10 x 20 storage closet before but that is a pain for several reasons, the lack of power and narrow space being the main issues.
--Kevin H.