HN user
Cheap money on tap from the bank pushes up house prices. Combine this with municipalities being unwilling to free up zoning for residential, and you have a limited supply which people will borrow as much as the bank will give them in order to obtain.
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Literally any teachers college in my country. You will need to look into options in your area
I did a one year graduate diploma in secondary teaching, can now teach math, physics and IT.
I taught in Asia for a number of years, easy to find work there if you're a native English speaker.
Another option would be to take up a trade, painting house interiors is something that you can learn fairly quickly, don't need a lot of tools for, and can charge well for.
That being said, each sector has its downsides, trades are quite prone to the boom/bust economic cycle and there are no shortage of, shall we say, mediocre schools around