Since Texas is a tax deed state, you gain ownership at auction, but the previous owner has 6 months to 2 years to redeem it by paying your bid plus 25% interest (in year one).

Since the original loan was apparently for a primary residence an LLC could never qualify because it isn't a person who would owner occupy the property. 2.

However, you have to be extremely careful financing 100% of the transaction as you still need reserves, closing costs, etc. and make sure it cash flows.You didn't mention if this would be a rental or owner occupied. 

I know for our portal in Buildium owners can log in and run different reports like income statements, profit and loss, general ledger, etc.

Some of the owners had wanted to sell and others didn’t.

For example in many jurisdictions I can STR units in a duplex but cannot STR an ADU (some jurisdictions will let you STR if you owner occupy).

Check in with a local Rental Owners Association

These units are perfect for owner occupants, and they are perfect for related living as you have described.

Which of the two scenarios are we talking about: Subject-to or Owner-financed wrap? 

Pull the vacant properties in your area and call the owners.