I have seen something like this on tv if I get the gist of what you are talking about, only it was for working on cars and other projects that you need machine work for. They would let you come in for a minamum fee and supply all tools, machines and assistance if needed. The machines were cnc, lathes and so on. I just wish i could remember what the show snipet was called so I could go back and look it up. It was a neat concept.