Even though the tenant always pays rent, the smoking violations, pest issues caused by food waste, over-occupancy, and noise complaints are significant concerns.

Are you/your partner(s) foreign nationals or non-permanent resident aliens?

You've done a great job with keeping your debt low so I have no concerns about your level of discipline to use/reuse a line of credit.All the best!

The city has never raised any question or concern. 

A post on recapture.People are concerned about recapture when they cost segregate their improvements and for good reason.Recapture is real, and those deferred taxes will need to be paid.But fear not!

Secondary markets like Greensboro, Winston, and Fayetteville will likely still be under the 1% rule, but our property taxes are lower than most northern states so the CoC (which is what you should be as/more concerned about) return will be favorable.

While I didn't want to stay there permanently, it was a stepping stone to build my track record. 

Need I be concerned with UBTI?

If these houses have stable long-term tenants, I share your concern.

Circling back on this topic, curious on others' strategies who are having success on Booking.com concerning how you're handling payments.