We have had duplexes with shared water, sewer, and trash billing, as well as shared driveways.The long term tenants act more like owner occupants, planting flowers, etc. and in some cases neighbors think that they are the owners. 

I'd personally say pulling your water heater out and replacing with a wall mount on demand one, would be worth the cost to have in unit washer dryer if you are staying there or renting it, it would be worth it.its always worth doing the big stuff well and correct even if you are cleaning up after someone, the long term hold always prevails, its just a little frustrating front sometimes, but hang in there!

OP, keep in mind not having access to heating and sharing same water heater and etc will require an easygoing tenant in the nextgen.

This shall apply to single glazing and each pane in multiple glazing.Exception: Glazing that is more than 60 inches (1524 mm), measured horizontally and in a straight line, from the water’s edge of a bathtub, hot tub, spa, whirlpool or swimming pool or from the edge of a shower, sauna or steam room.

If you are on the fence with the above, then you should sell now as you enter the spring market.

First of all, let me pay my respects to the hardworking people in real estate and the treacherous waters they navigate—fronting hours of effort with only the chance of commissions and an abundance of non-forthright people out there.

Sewer and water in my area is around 10k a unit.

Like deferred maintenance, (bad roof, worn out water heater/AC Unit, warped flooring, water damage) etc, unpaid utilities,  unpaid taxes, a second loan, unpaid HOA fees, a bad pool, bad reputation, sometimes squatters, sometimes they were drug houses, and so on.

@Alecia Loveless is correct--tenants need access 24/7 to their electric service panel, water and heat, assuming those are individual utilities for each unit. 

I am going to be moving in the spring and will begin renting out my current place of residence at that time.