Thank you.  This is very helpful, as it's nice to know what others are doing.  That's what I ended up doing.

The guidance provided by Intuit, though, indicates that rentals marked as self-rentals will be included in QBI calculations.  They never mention that you also need to override the "this business qualifies as a trade or business" input.  This begs the question, then, what exactly does denoting the rental as a self-rental do (in relation to QBI calcs)?  I don't think it does anything.