Don't know if anyones had a straight answer. I've just signed up and they recommended QBSE for my rental and QBO for my company. I used to use Xero, which is a far cry from good for this as its far more expensive but so much easier to use, hence I'll be going back to it because QB is just not it and is making me put in more time and effort, especially as I have to completely log out of the site and the app to log back in to switch between my business and rental.
