What do you do for extra money during months off as an ALT?

I've seen conflicting things saying whether you can apply from Instructor visa to be able to work Uber eats. Some say you can and some say you need either a PR or Student visa.

I've seen some say taking those random weekend or random jobs (like when a company needs extra people for a English camp or some event), but those seem so few and far between, almost never find those.

On an Instructor visa, is it possible to apply for a visa to be able to work somewhere that actually brings in good money during that time. I have March and August with no work.

Thank you very much