I want the money we make from airbnb to cover our rent first
Why do you want to use that money for your rent?
What else should we do with the money
It is smart to spend your money on rent first. It is the responsible thing to do and you will at least have a roof over your head.
I don't like being frugal.
Yeah, you're doing the right thing by paying your rent first rather than spending on something else. It's nice to know you're not frugal.