Recs for business checking accounts and credit cards - can you have too many?

[Michael Ghim]

What do most do in terms of keeping rental business out of personal finances? My eventual plan is to scale - do most have a single financial LLC with its own checking account and each rental LLC finances go through that one? Or do most larger investors keep a separate credit card and checking account for each LLC rental? Or do you have a checking account for each rental LLC, and a single business credit card? Each of the scenarios, I anticipate can be a headache for bookkeeping and have pros and cons.