You may have water traveling down the bedroom wall, then across the dining room ceiling to the lowest spot which happens to be there.

Unfortunately, you said some magic words that chum's the waters so que the "please contact me PLEASE CONTACT ME" replies vs actually answering to what you posted...... 

IE at the time if you built on all the hundreds of thousands of lots there you would have perpetual grid lock not to mention water quality etc etc.

The big deals will be vacancy, capex and appliances. (3 water heaters, stoves, fridges, microwaves?

Year 2 had some large expenses, including some CapEx items (water heater, roof).

The pipes have to be dewinterized so I would have a plumbing professional there prior and when the water gets turned back on just in case.

Costs have escalated sharply, water up 25%, electric up 30% and natural gas up 33%, and at one property insurance went up 400%.

Don't forget about paying to start electrical, gas, water and internet services.

Inherited tenants are usually a negative, however in that area leaving the duplex totally vacant makes it a target for thieves to come in and steal your pipes, furnace, and hot water tanks.

Use to use water, it does not work as well over the masses.