Basketball Flooring Cost

How much would it cost to have a basketball court/gym built onto or in your house?
i know it takes thousands, mayb millons to build HS gyms and stuff…cause of the space, bleachers, type of floor and all that……..well i was thinkin it cant be THAT expensive to build one in your own home……obviously high enough walls and space, a hoop or two, and a hardwood floor….mayb even just half court like in that shows Run’s House…..well is there anyway to estimate a price for somethin like this?
also, reccomend a better category if you want…i wasnt sure where to put this question
http://www.bobvila.com/wwwboard/messages/223337.html Gives an estimate of 100 per squar feet and says it will cost at minium of a half a million dollars because it takes 5000 sq feet. But i think it will cost more for a nicer court and to pay the workers. I would say about anywhere from 700,000 to like 1.2 million dollars could give you a nice court. You were to build your own i would say about 30- 45,000. I think that estimate above is for like recreation gyms and HS courts i could be wrong.
UConn Men’s Basketball Highlights (2008-2009)