Thanks for the quick replies! There are no companies involved (yet), I own one rent house in my name and the other is 50% share with my sister (house we inherited from our folks). Right now, we have our shared house in one bank account (both have access) and I started a new bank account for my rent house (it was my former personal residence). I am leaning in the direction of keeping just the one bank account in my personal name for future single family acquisitions unless I decide to partner with someone else on those. In that case, I'd set up separate bank accounts for each property involving a partner (or probably set up an LLC before that and have that bank account for any partnership deals going forward).
As far as bookkeeping software, that's another question I have and will likely explore that in a separate message thread but I'm using MS Money right now to track income/expenses and have considered moving to Quickbooks. I'm still undecided on what to do moving forward but will re-visit this topic later.
Thanks, all! Good forum, glad I found it.