CH
I know Mike was joking but if I were you I would give serious consideration to designing your studios using pencil and paper and scanning them in. All too often mockers conceive a great concept but because they don't have the software to execute such a complex mock to a decent standard, it ends up looking dreadful. Whereas with a pencil, paper, ruler, etc. you can pretty much create anything you like for next to no cost. And, paper doesn't crash.