I assume it has sewer/septic, water and electric and they 2 tiny homes are plumbed/wired?

It would hold up to water or condensation from cups.

Fridge filter is like a lightbulb it is a consumable that they can get or not get, makes the water better or I suppose the fridge smell less but it is not essential.   

Quote from @Natalie Allie: If you are still considering the Land Bank in Detroit listings, just be careful to check with the city on whether or not the water needs to be reconnected.

If you have a 6 bedroom in an area that does not have a university (students looking for shared space) or is in a family friendly place it may sit vacant longer between tenants.For Capex, try not to use a generic number - look at the roof, furnace, hot water tank, kitchen - when will each need to be done and what will it cost?

Given this is where my major operating expenses fell (beyond taxes and insurance), keeping this cost lower, by average, helps my cash flow.I invest in older neighborhoods, so the 2-4 unit properties, typically have single water meter, maybe single electric, and many have radiator heat with a single boiler.  

For now I have my toe in the Bitcoin water.

Its extremely important when running tighter margins like what you're talking about to focus on age of HVAC, water heater, appliances, roof, etc.

Also, Investors need to be prepared for and understand if there are additional costs that come with foreclosures, such as water bills, and potential fines for property upkeep.

You might need a 2nd well if you're not on city water.