If you want to start big I always suggest starting with a RTX 3080 as a single card like this can make you like near 200 dollars profit with today prices,prices of a such card is really high now but if you want to start aggressively this is the way to go.You can add another card after some time have passed.
Aren't these LHR though?
I am talking about the non LHR cards obviously,this version is LHR and non LHR,only 3070 ti and 3080 ti area always LHR by default.Having said that even the LHR version of 3080 can make you near 150 dollars profit a month by mining Ravencoin or other non Ethash algorithms.