Set up a business and get a proper e-mail account.

Take ownership of your mistake and learn to do the proper due diligence recommended above😊

If the movement seems excessive, you might consider having another technician inspect it for proper installation. 

When initially purchased, the property was in disrepair and had not been properly managed for 10+ years.

Properly testing for types of mold could be a few thousand.

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.

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.

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