The service was off for a year(which I didn’t know) and the unit required an inspector.

Nests are typically marked off with 4 wooden stakes and have plastic / caution tape wrapped around the posts.  

Does cousin an owe less than 1/2 the value as he will probably have to pay off his mortgage to sell.

This deal was completely done off-market.

best is to connect with a realtor and get some contractor recommendations as well as 3 off of google with good reviews and go from there 

You get your money without the tax hit at the moment and hopefully continue to profit off them,   If the objective is long term passive income, it doesn’t make sense to sell them… it moves you away from your goal post.  

Always be sure to educate your tenants on what this alarm is, and how to tell if it's going off so they can notify you immediately

One family member wants to move to get into better schools, but they don't want to give up their 4% rate and they're fine right now to continue to hold off, keep looking and wait for the next couple for years. 

The maximum the bottom edge of the opening can't be higher than 44" off of floor. 

Also, is there a clause or addendum you use addressing the possibility of the property not appraising for enough when your buyer goes to refi to pay off a balloon and how the parties will continue?