I work with University spin-outs mainly in Life Sciences. They take years and cost millions of dollars betfore they can start generating revenue.
I also own a metal recycling business. It is on track for USD 10 million revenue with about $1 million EBIT. This business has a low risk, it is cash-based and generates cash every month.
Basically, working with the startup are almost a charity. Yes, I like going to various universities, yes, I dicussing Deep Technology but my main source of incone and wealth comes from used beer cans.
Why do I need more that $500K pa? I will be dead soon enough.