Paint is likewise reasonable at $30ish/gallon but the cost is in spreading it. 

Strip away, this fool lives worse than pigs, I will have to strip out any remaining drywall, strip everything down to the studs, pout 1000 gallons of bleach on the cement foundation, and likely much more just to clean it up.

I buy doors for 60-70% of HD prices and sometimes even less.I have a local paint supplier that sells mismatch paint, 5 gallon buckets $20 for interior and $25 for exterior. 

We typically add in paint additive to the 5 gallon buckets to also add a good smell to the flooring/walls.

You'd be surprised what a little paint & primer will do to a property. very cheap too. only $25 for primer/2 gallons & $25 for paint/gallon. so maybe $150 after material + a few hours

I put about $800 in it for labor and and about 40 gallons of vinegar and about 20 pounds of baking soda to get the dead animal smell out of it.

Concerning Water Sub-meters: Older buildings typically do not have individual shut offs (individual shut offs allow water to just one apartment to be shut off) a/k/a non-segregated plumbing; When allowed by the regulatory agencies, (in nonsegregated plumbing) a meter is installed on the water supply to the hot water heater; The meter measures the amount hot water consumed, the tenant is billed for every 1 gallon measured (hot water) the tenant is also billed 2.75 gallons (cold not metered); This is called Ratio Billing.When ever possible full capture is more accurate and allows for better leak detection.Sub-metering for smaller properties: Usually a sub-metering service (Reading,Billing, and Collection a/k/a RBC) will require a minimum to service a property; Although a reasonable billing fee can be passed through to the tenant; Smaller properties say less than 5 units may not be economical.Regardless if you bill your tenants for W&S, installing sub-meters will allow the owner to personally monitor leaks, waste, and excessive usage (extra tenants not on the lease) by apartment.

For our 8-plex, we pay monthly: Garbage $110.77 (1 yard dumpster, weekly pickup) and Recycling $9.60 (two 90 gallon carts, weekly pickup, calculated at $1.20 per household unit) and Yard Debris $6.90 (bi-weekly pickup).

This includes getting a 1000 gallon tank, the county not liking the plastic plug in the bottom, swapping for 2 500 gallon tanks, and a few other glitches.

If the property has publicly serviced sewer, which is most times billed based on the number of gallons of water used, by using sub meters, we now have the information we need to pass along the sewage charges.