This is simply the reality of the paradigm we are living in today.

I've considered selling to investors, but I'm concerned they might want a substantial price cut, which is why I'm trying to sell it to residential buyers first.

Ignore their attitude (yes it can be hard) and either start with an eviction as they are in violation of their lease for non-payment (the $900 they owe) or simply do not renew their lease. 

Does anyone know if the fire sprinkler system will be needed if I simply rezone the basement as part of the first unit?

Most do survive the cuts and make it to the sale.  

With rates expected to be cut next month I would suggest a 3-6month CD to lock in the higher rate as long as you know you don’t need the money early.  

Perfect STR market for people "cutting back" from Carribean/Mexican/US Coastal vacation trips to drivable, more affordable trips from Houston/Austin/San Antonio (even DFW). 

Never understood the catch to places like new western, you can literally only wholesale and make a small cut from every deal.

I currently have a very stable software engineer position and eventually hope to cut back hours or become a contractor that works 20 hours per week once I am able to hit some of my financial goals.The ADU seems like a potential way to keep my mortgage expenses down since I would just pay for it up front with the sell of the property.

If people want to visit the area and there are no airBNBs, they will simply stay at a hotel.