Also the windows are old but how much does a tenant really care about the outside and windows?

Nicely done and I don't care what anyone says, design matters! 

In a SFR, you have to make a careful call.In a situation like an apartment it is a bit easier because you are dealing with a larger number of units. 

The issue the family has decided to cut my access to sewage access off and won’t even talk about turning it back on.

Should I care about the rodent droppings as much as I do?

Should I care about the rodent droppings as much as I do?

They are threatening with unreasonable demands such as, give me the money now and I will vacate later else I will cut loose and create havoc.What are your thoughts?

Address doesn't get changed or forwarded or enough time passes the PO will not forward anymore....so no one gets the notices, and it goes to foreclosure.The % is probably really c/o or should be, but they don't have a key for that so use % and that means "in care of" .Let's say dad moves in with the kids, the bill gets addressed to dad c/o Dwayne Wade at the new address. 

It cuts the flow of water and saves waterAdjust the water pressure on the main water line coming in the property.

I think you need to cut him out of your life and your child's, at least for a while.