We are looking to open up the wall and then raise the floor and plumb 2 heated and cooled air duct lines to the room.

I really like OKC but it has tornados that kind of prevent me from looking further. 

If not, there is a legal reason preventing them.

Repaired deck, new air condenser unit, repainted interior and exterior.

However, the entire market depends on Robins Air Force Base, with not much else moving the needle.

There are no restrictions preventing out-of-state investors from purchasing rental properties in Texas—these investors enjoy the same opportunities as Texas residents.Additionally, the financing restrictions you mentioned don’t align with reality.

Moreover, it allows you to set the terms of the lease agreement according to your preferences, which can help prevent misunderstandings and disputes in the future. 

We’re looking primarily at sfh for air bnb.

@Avani Patel If it hasn't been created yet, if someone were able to do that at the property level, they'd be a gazillion-aire!

If you do end up segregating, keep good records to prevent having to recapture the depreciation of the reclassified assets.