Miami basketball with no actual fans is not going to pay players millions and millions over decades.
Schools that have a combo of both real fan interest and real booster money will be able to keep a huge pro player payroll going annually.
There may be some case of a random rich guy or company that feels they want to dump millions into a team with few fans but it won't be the norm. There's just not a lot of reward in it. The local fans/alumni either care or they don't. Take that brand away and it's G League or AA baseball.
Only need 1 guy with $100M+ net worth for a basketball team worth of salary. He would be the "owner" for all intents and purposes, just with no revenue for his "business".