You need to talk to some kind of international law professional. 

Most of which are repeat family visits year after year.

The idea that his bad engineering and planning would allow him to pump water onto your property is kind of stupid.

There are a couple of us CPAs here on Bigger Pockets who can advise and help with these kinds of returns. 

What kind of heating/cooling bills are you tenants looking at?

All kinds of inspiration to be had around this website!

I am kind of thinking out loud here; it seems like for some of these transitionary deals that would be why it makes sense to work with someone experienced to start, or theoretically house hack to save money, but otherwise only uphold an expense that can be managed.

or try for sale by owner (Craigslist)...We'll explain that there will be more fees involved, and that it will take much longer to sell (especially in this market, compared to a few months ago) - but that if they're not in a rush of any kind, that it's usually their best option...In our experience, the best thing is just to give people real advice, and if you can really help them out - tell them that.Small margins are also tough for rehabbers, who are taking on risks and spending lots of time and money on the rehab.Best,Sean

what kind of financing can you get?

Learn, and decide if it is the kind of place you want to invest.https://www.meetup.com/Unofficial-Biggerpockets-Real-Estate-Meetup-Anne-Arundel/