While not in TN specifically, I have assisted clients do as you have described: live in a property as a principal residence for 2 years, rent it out for 3 years, then sell.Based on the situation described, you would appear to be eligible for the MFJ joint exclusion on principle residence on your 90% share.However, in order to retain that ability, the house will very likely need to be sold (ie, sale closed, not just under contract) by the end of this month. 

Happy to assist where I can.

Buy another property.I can assist with financing options on either route, let me know if you'd like more details!

They don’t sell off their mortgages so I will always have a local connection in case I need assistance with the loan or any other aspect of my business.

Focus on getting to know local, experienced Realtors in your town & offer to assist them for free so that you learn.  

The kids can wreak havoc in a unit so more damage than the avg market-rate tenant. where I worked in Jackson ms and owned a few hundred section 8 houses.. the statistics for the amount of local residents on some sort of assistants is staggering..

While changes are normal, communication and transparency is needed throughout the process.Since you paid for the appraisal, you could seek a new lender that can give you more clarity and possibly better loan terms.I am in the Fort Worth area as well and I can provide you some reputable local lenders to can assist.

If you'd like assistance in finding a suitable option, I’d be happy to help!

Let me know if you’d like more details or assistance with financing options!

Get a personal assistant and teach them how to create a CMA.