

Maybe it is different elsewhere but according to my calculations, renting property is not very profitable. Investing in stocks is better if you only want to make money and do not care about the apartment otherwise.
You can’t easily get your money out of the property and if loan rates go up, you pay more and the property value goes down.
The real parasite is the bank who takes a cut but has little risk as the money it lends out is created from thin air.
It depends on what you are practicing. If it involves things out of your control, for instance poker, you definitely shouldn’t adjust after every result. In the poker case that leads to not playing well just because you lost one time.
Even in less random things you have to be absolutely sure you found the problem before adjusting.