I think I'm starting to get lost in here somewhere. Here's some general info that should get inserted in here somewhere. Phast and AMX are now one company, Panja. Phast made Landmark, which is leaving VERY soon, and AMX makes Axcents, which will be around for awhile yet. Landmark uses a drag and drop Windows method and Axcent programming has it's own C-variation language. There is a Windows drag and drop type program, but this is for really simple systems. I haven't used Crestron systems yet, but my understanding is they're fairly comparable, though a little prettier to look at.
Escient works with lots of different companies to push Tunebase (and now Powerplay) into the home theater mainstream. I work for Escient Solutions, the home theater installation part, and we primarily deal with Lutron HWI for lighting, Panja for control, Channel Plus for modulation and Xantech for all the miscellaneous other things.
To answer the original question, I'd probably get an Autopatch and use keypads throughout the house to control the inputs/outputs. The higher end models even have component video switching with something like 8 source inputs and 12 room output. You won't get anywhere near 70k, but you could spend quite a bit.