No offence, but I think you'd starve.

Most people who are into cars and have the means to build the nicer ones already have their own garage, or simply commision the cars/work to be done.

The guys just starting out would have a hard time affording it no matter how cheap it is.

I'm retired military and remember when the use of the base craft shop was FREE. Then in the 80's it went to a very minimal fee (something like $.50 an hour, with a storage fee after so many days) and even then the use dropped off. In the 90's the Craft Shop went to a fee schedule at about the same rate your proposing and it was darn near empty.

As far as I know it's pretty much a commercial venture at this point, run by a contractor. They do rent space and tools, but also basically run a comercial garage out of it where the car can be dropped of and fixed by the staff at a relatively competive rate with the garages down town. It basically took the place of the old repair shop in the PX gas station when the PX gas stations went to a mini-mart operation. The last time I stopped by admitedly a few years ago, there was almost nothing there but cars being worked on for customers by the "staff".