Whichever PMS (property management software) that you use make sure it integrates with your lock.

Use keyless entry and can even have wifi locks if desired. 

We pulled the trigger on moving to Texas.

Wow, was that a loaded question,  I have done just this to help the owner pull the trigger if the owner is a little bit low on funds for the labor end of the project. 

It can get pretty complex versus long term rentals - I'd highly suggest using tools like AirDNA that has pretty sophisticated data and projections on STRS in every market before pulling the trigger

Lock the seller up on a contract and then take it to a bank? 

Just waiting to get the word on our move date from my husband's company before pulling the trigger on engaging with realtors and sellers. 

In other words, guests will only be able to control the AC between your locked min/max temperatures, but they would not be able to change to heat mode.

Change the locks immediately.

Hopefully I’m able to find something so I can pull the trigger on my first deal.