LLC structure in Michigan, juggling the bank accounts

[Keri Middaugh]

Hello, everyone, my question is about how to structure my rentals and flips in 1, 2, or more LLCs.  I've perused the forums and haven't quite found what I'm looking for.  Ideally, I'd have a simple system that does not involve entities within entities or multiple bank accounts.

Also, what are your thoughts about PO box vs. UPS store box?

I've gotten some counsel on these items from 1 person, but I wanted to see what others have experienced.

Thank you,

Keri 

(flipper and holder in SE Michigan)