<a href="http://www.vrbo.com/vrbo/14634.htm" target="_blank">http://www.vrbo.com/vrbo/14634.htm</A>

This is a 6100 sq ft house with pool in Las Vegas. the rent seems high, but maybe you can get a deal. $1000. nightly mid week, but divided by 10 couples it may be worth it. A 40th b day pool party in a private home sounds like fun.
There are many more homes for rent on vrbo.com
Its just another option.