I'm not sure if it's realistic for NBL clubs to make a profit.
It's something us fans better hope rich guys keep doing out of love and fun.
Few of us are across all the details that become publicly available, but from looking into this in the past, as best I could ascertain there's only about 4 sporting clubs in Australia who make a sizeable profit ($1mil plus). They were West Coast, Hawthorn, Brisbane Broncos...and Collingwood maybe? I can't even recall who they were.
But I know the majority of AFL clubs make a profit (pre-covid). But it's mostly tiny profits, except the 2 or 3 powerhouses.
Maybe half of NRL clubs make profit?
But NBL, A League etc, I doubt there would've been any time in their entire histories where the majority of clubs were making money.
I'm not sure that's a statement which could be definitively proven either way, but I'd be confident it's true.