My cleaners take a video after every turn, my team goes in to check everything is good after cleaning and record salt and PH level logs and I have a licensed plumber who is in charge of maintaining plumbing, water heater, and boiler system with logs.

I just don't want to buy that close to the water due to flooding concerns.  

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

The interior will need to be repaired and repainted.I've done several 1900 - 1920's and while they usually have good bones, the electrical can be underpowered for today's needs, and the water lines can be corroded galvanized or even lead.

In case I have to sell or I quit running STRs I wouldn't want to be under water out the gate.

So adding this to my prospecting plan may provide reach to do deals that I may not have had before simply circling the usual watering holes.

Water galore.

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. 

Fill water tub with water a couple minutes( good time to tighten down toilet bolts and caps) caulk tub five minutes.

While replacing the toilet, a burst pipe caused Cat 3 water damage that rendered large part of downstairs kitchen and upstairs bathroom unavailable and cordoned off for repairs .