I'll jump in here with some actual usage data.I have 250 units on stayfi and have been running it for a couple of years now.I initially got it to simplify my wifi login process... 

Outside of that; it's a crap shoot in life.Many many decades ago when I started, I was in a small Brooklyn, NY apartment with brown water.

Some areas and lots use well water others have city water.

We’ve been tossing around the idea of converting one of our bedrooms into a gym (treadmill, weights, bench, etc with towel and water service).

My model projects these can be without private or individual site water, power, bathrooms, and/ or wifi and still be worthy investments. 

You aren't "dead in the water" by any means.However, there's a piece here we don't know - how much do you owe on the property?  

The investor portion is whether a landlord should rent their property to an AirBNB host for a premium or insist only on primary residential usage.

I Expect not, I expect the water to get to my property even more in the next few years. 

In spite of all that work we discovered that the hot water heater didn't work (they didn't bother to replace a $300 water heater that their initial 4 point inspection stated was original to the house (1983).  

For water we always keep that in the owner's name (since, in our area at least, water bills run with the house and not the customer).