Private money cures a lot of problems if you spend the time to attract it.

So are most of the 'cures' if you contract them out.

You can mention the problems you are having, as a reason to sell, but I would not harp on it too much as the mission here is to sell to them first, cure your financial problem not your neighbor problem.

I would post a cure or quit today, assuming that's the correct course in your state. 

They also have 2 dogs now without permission.I was thinking of giving him a 15-day Notice to cure Violations or Move Out notice to just protect myself (in the past I was generous enough to try helping tenants that backfired on me). 

No, the bank won't let you assume it.If its in default, you will need to "cure" it by paying any back payments, late fees, and any other charges.

@Ariel Bullinger...common fear from many buy & hold investors...proper screening is the best cure for that.  

Not sure about your local market conditions, but in mine, no bank will entertain offers (even if all cash) that much below ask price without it getting some time on the MLS.That is why having the relationship could be your cure all in this scenario.

If you default they are required to give you notice, usually 30 days to cure your default or you forfeit all interest in the Contract and the documents are turned over to the Seller, and files the Quitclaim deed from you to him.There are more details but hopefully you get the idea.

As the others have mentioned, the truly biggest hassles are not things software or technology can cure.