We have thought of purchasing your property because we are very happy with the size of it as a starter home, and can see our family staying here for many years to come.Finally we want you to take into consideration that we will continue to make our payment of 725 for the remaining 35 thousand dollars that we will owe, which would be paid off in less then five years.

Bonus here is you could update the letter on your site and the bit.ly link could remain the same. 

My question is should I go ahead and take care of the remaining repairs while it's listed?

Either suggests you want to remain there. 

I have both exclusive (meaning they cannot sell the land to anyone else during the duration of our agreement) and I also have a non-exclusive, just in case they're not comfortable tying themselves down to me.

The remaining 2 properties I have the certicates 👌 and haven't moved forward due to his shenanigans.  

Apparently the best way is for each of the four tenants to remain in their respective apt and each of us buys our individual unit, which is a possiblility. 

Once all the drywall is gone the contractor would need to spray a biocide that will kill any remaining mold spores....they are very tiny so spray each stud and the wall behind it.

Now he is looking to rent it out but he has a ton of his money tied up in it that he would use for another flip.

My proposition was to tie up the property under contract for 30 days with an agreed price that they were asking, market the property to find a buyer that would pay a little more, assign my interest to that buyer, and everyone would walk away happy.