If they are safe and in working condition, I would just repair as needed and leave them in place until they officially die.

How to compare 10 different official loan estimates from 10 lenders to find best deal?

Unfortunately it's also one of those things that doesn't announce itself by its absence - in other words, agents can go years and years and never realize how much money they've lost by not actively asking for referrals.

It will cost more than $520 million to build using public and private funds.Frisco officials estimate it will have an economic impact of more than $2.5 billion over the next 20 years.In addition to the association's 100,000-sf headquarters and education facility, the project will include two 18-hole championship golf courses, a nine-hole short course, and practice areas for a total of 45 holes.

Spray foam is an option but more costly.I assume you are pulling permits - I would just call the building official and either A) tell him your plans or B) ask what he recommends. 

Are you having the current tenants sign estoppels before the sale becomes official?

County Clerk Of Court, Official Records search, search by name....it will show all mtgs, deeds, etc.

Robinhood announced today that they will be offering a checking & savings account that offers 3% interest compounded daily.

The official name of the program is “housing choice voucher”, meaning the tenant with a voucher chooses your home.

Almost certainly they will want it built on a solid foundation, which doesn't sound like it would be an issue for what you want to do...Depending on what is/isn't allowed in your jurisdiction - or what is a grey area, such as a tiny house - building a friendly relationship with local officials can often help clear up any confusion and red tape to get you going.