And in real estate if something isn't selling it's one of two things, you either aren't reaching the buyers (i.e. not marketing sufficiently, which it appears you are) or your price isn't resonating, which I suspect is the case.  

If this lien is from people who are squatting, it is suspect.

I know in my area (and i suspect in many areas across the US) that anyone who can pay rent of $3K month can probably afford a $300K place.

They did not specify which terms they cannot agree to, but I suspect they simply found a better place and are using the HOA as an excuse. 

@Jr Trotta, if going back in time to make changes was limited to this one area, I suspect many fix and flippers would change to keep the properties as rentals. 20 years into the future it would be MUCH better to own 100 rentals than to have done 100 flips.

I suspect him having taken marketing fees for 500 plus homes with no license is going to come back and bite him as well.. 

I suspect most heat pumps farther north probably use gas for the backup heat.

[I suspect not, unless your lease has expired anyway?]

I suspect any good attorney could pierce a small time landlord's LLC anyway. 

Hi Jason ,Some other things to consider ,is there electric to garage ,is it above or below ground (code )I suspect you’ll have to run water out there ,then dump it ,how are you going to do that $$Then water heater ,plumbing ,furnace,meter it separately for gas ?