I’d Tell them your okay with it and long as they don’t tear up the yard and park so as to not block anything or cause a disturbance with a neighbor .

Can they block the sale, fine me, force me to sell, force me to rent out only one side?

Look for the worst homes on the best blocks.

An agent could likely find it on the MLS but that information is blocked from none licensed people.   

As another example when half the houses on the block are in foreclosure tough to look at your property and see roses and sunshine.

Redo the shower pan with a vinyl liner and build the dam with blocks.

I offered to come pick it up in person but he blocks every avenue of communication at one point or another.

That was one of the areas we were focusing on and loved the street because coincidentally our family friend who was our real estate agent lived on the same street about 10 blocks away.We went to visit the house and there were already 30+ offers mostly cash and over asking!  

It is still being modified but as of now, they will be limiting the density of STRs to 1 out of every 8 houses on each block face--if you don't get grandfathered in.

I’d refund her money then block her contact in your phone.