I am sure all of you experts have come across something like this and if they only answer is you have to unclog enough toilets until your hands turn brown then so be it. 

I’ve had 3 main water liens fail, 2 toilet supply lines fail and flood different Properties, a $12,000 bill when Both units went out on a property.

Low risk No landlord heaches about a backed up toilet at 2am. 

That means you have three additional years of finance-free income, compared to the 15-year loan.Additionally, like has been mentioned already before, if something happens (toilet blows up, roof starts leaking, etc.) then you can forego that extra $300 payment and put it to use fixing the property.

Since it is a bathroom, the toilet drain may be crossing your ceiling to the wall, so it may also just be a wax ring for the upstairs toilet that is seeping.

I won't be able to add a septic so I'm looking into greywater systems and composting toilets.

If nobody is squatting just let it take it's course. 

In either case, you can't work on the property as it must be a passive investment (e.g. you must hire someone to fix the toilet and can't pay the expense with non-retirement funds).7.

My brother said "You'll buy a house but it will have a toilet in the middle of the living room and the worst part is...it works."

I have a sneaking suspicion the American economy will be in a housing recession. but if its (likely) not in the toilet... i'm looking for an alternative to real estate investing. also currently in Phoenix, AZ.