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.   

If you buy a high cash flow property in Cleveland, over 5-10 years you will most likely break even on the cash flow or just be treading water.

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?

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

The agent said this is likely a market standard.

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

I am through module 1 of Kai's course and it is definitely like drinking water out of a fire hydrant.

I think there are two maybe 3 ways to look at this in my mind.  1) you go into it and bring it all up to modern standards but using that old charm to basically take what is there bring it up to modern standards and rent it out essentially I'm thinking cocktail bar or something trendy like that.2) most banks are on really good centrally located real estate if this is true, then I'd consider it for the dirt, plan to scrape the lot and go vertical with whatever the highest and best use is.3) a kind of combo of the two, if the lot is in a good location and its doable, pull the vaults or other "character pieces" out of the building, scrape the lot, and build whatever is best suited for the site there, but incorporate those historical pieces into the final designs.Is the site near a major retail area? 

Augustine standard where most in fill lots are around 50' x 100' to 125', 200' deep dryland is a good lot.

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.