I'm looking for info on specifics about book keeping, tax structure, or any other info pertaining to those things.

What is the advantage of this--simply to make bookkeeping less complicated, or does it give some kind of extra asset protection?

Edita,How many accounts you have or need somewhat depends upon your bookkeeping system and your cash management practice.

Easier bookkeeping and less tax issues.

I do the bookkeeping for all of them.I wanted to buy one more last year, but my mother did not want to incur any debt, so we only bought 1 last year.

She is a dam good secretary and book keeper. 

Have you also been able to use it for any bookkeeping?

@Austin HughesI would have a bookkeeper cut all checks-have a protocol.

He also provides bookkeeping, tax, and tax strategy services which really sets his company apart.

A bad tenant can be your greatest expense when you factor in the cost of eviction, unpaid rent and property damage.I actually had my rental agreement, application and all related notices already on my computer, our LLC set up, and my bookkeeping system set on Quick Books BEFORE we bought our building.