I have a few questions on some ideas I have.

Long time investor/landlord in NC and SC, let know if you have any questions?

Quote from @Tom Dieringer: Great question, in particular, for those who don't live next door or down the street.

I have a followup question - I will realize a lot of capital gain from this home in Idaho, so I think unless I purchase a new primary residence I will have to pay that capital gains tax. 

I would love to just give you a simple answer, however your question is not a simple one. 

There's a good chance the issue(s) you face has already been discussed and answered.Ask questions in the appropriate forum.

In construction your plans are your Bible, so you need to know how to locate any discrepencies, locate answers to questions froms trades, understanding "Take-offs" with your materials, and be able to visualize in a 3D space what the plans are describing.

Ask questions and don't be afraid to dig in.  

Great questions, and I will be totally up front in stating how new I am to all of this.

I am asking for any guidance on what else to look into for MTR to make sure this is the right decision for my mother-in-laws property.I appreciate your time reading my post and answering my questions!