For a year or two. But if you are not successful, how long will those 15 people continue to pay?
For example, take Yuri Collins at SLU. Rumor is he got $200K from one donor to play for SLU (the same donor who donated the money to build their arena). So what did he get for his money? Player of the Year? Nope. A regular season conference championship? Nope. Tournament Championship? Nope. He got a 4th place regular season finish and a loss in the semi-finals in the tournament.
So, will he be willing to keep putting up that money each year? Well, if you have enough money to do that, maybe. But most smart money people I know want results. The results he got? Well, I would want a little better return on my investment.