Lol..True..
If your father is poor it's not your fault, but if your father-in-law is poor then it is definitely your fault

So I would rather find a millionaire girl and would get happily married and happily rich

Well yeah that's the point, there are many choices to choose how to get rich
here is a great quote: If you are born poor its not your mistake, But if you die poor its your mistake.
Maybe this will inspire you.