There really isn't enough information here for someone to give you a proper answer.What you need to do is calculate those tax savings over the next 5-7 years (or however long you plan to stay in the house) vs. what the interest rate reduction will save you over that time period.

How do I properly analyze this property?

You are correct the proper word I am looking for is ownership.

This is just me reacting to what they’re doing.  

The right wholesaler that knows how to properly calculate a SOW (scope of work) to gain the rehab budget, generate an ARV from local comps and not want to get rich on every deal is NOT easy to find....but, they do exist.

That is when they can get cocky and that is even worse than someone who doesn't think any of that but reacts and is ready without being overconfident.I have actually been attacked in the past so can speak from experience.

Proper setup from the start can prevent major issues and ensure you're profiting from the start!

I would be interested to hear from investors in areas like Arlington or Dallas proper where it has really locked down on STR regulations and hear how their transition to MTR has gone for them. 

IF you try to obtain it without a skilled Expediter who has experience getting one, you are certainly not putting your best into attaining it.That being said, I have known some expediters who are supposed to be really good make mistakes or don't have the proper knowledge either.

Your attorney will review the contract, help with due diligence, and ensure that the closing process is handled properly.