Here's a money-making idea you perhaps haven't thought of: Buy a house. But don't live in it. Rent it.
https://www.jameknowln.com/2019/03/3-great-ways-to-invest-your-savings-if.html
https://www.jameknowln.com/2019/03/3-great-ways-to-invest-your-savings-if.html