Need advice on a buildout

So I've been researching for weeks. Setup two small servers just to make sure I could get cold hard cash back for the processing power. Ready to move forward and have secured an investor for $100,000 - $250,000 worth of equipment for a buildout. I had enough trouble finding the cards to run in two simple servers. Does anyone have any suggestions on a large buildout such as this? We have a large airconditioned room in a country club secured for the buildout. Great airconditioning and going to be running enough fans to keep it good to go. Rackmount or standalones are not an issue. Does anyone have any suggestions for me? How to secure massive amounts of these video cards (mixing models) is not an issue to me. I don't mind having 300m/hash boxes mixed in with 2g/hash boxes. Also the club is setup for alot of juice but will I need to roll a power truck and have 10-12 new circuits installed? Also should I join all this equipment to a established pool or just run this solo? Please any suggestions will be greatly appreciated.

Thanks so much!
-Brad