I think you'd be hard pressed to find very many radio or TV stations with "money coming out their ears." I’m sure they exist, but they are the exception, rather than the rule. If they ever actually existed, the days of having a "license to print money" seem to be gone, For every fortune that has been made in broadcasting, I suspect that several fortunes have been lost.
Back in the 1960's, I worked at a TV station that signed on with the idea that you could have money falling from the heavens if you just put a picture on an otherwise unused TV channel. The programming was horrible. The station lasted exactly one year. It turns out it is harder than it looks to get an audience and attract sponsors who will actually pay a fair price for air time.
While you certainly can make a decent living in broadcasting, financial progress is usually fairly slow. Even if you have the money, you might want to keep something in reserve. Just to keep your cash flow under control, it is very appealing to pay $500 a month for your transmitter, rather than writing a big check for $30-40,000 all at once. When you consider it, it’s not much different than buying a car.