The home was in rough shape—think mold, a hole in the roof, and years of water damage.

Just starting to ever so lightly tread into the water....

Water galore.

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!

Also, my guests always love my little goodie basket of snacks and a few bottles of water. 

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

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. 

Software return people with specific attributes, be it foreclosure, whether they bought houses in cash before, whther or not they have dealt with a water shut-off list.

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.

@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.