I can think of mortgage, taxes, insurance, STR insurance, water/sewer, electricity, trash, internet/cable, cleaning (can pass through), supplies, and software.

I put in some new flooring and paint, minor electrical, and a couple of ceiling fans (approx 20k in repairs, appliances, travel, and holding)I put in a new refrigerator, washer and dryer, and leased it myself to a family a few months later (6 months lease) through an insurance company because of their home being a total loss.

I did all the work myself except electrical and 1/2 of the painting.

The cost is prohibitive to make them fully compliant by adding ceiling height, windows, doors, electrical upgrades, plumbing upgrades, etc, but the city is also aware that it can't lose all of these truly affordable housing units. 

I'm assuming it got that way because the electricity was turned off?

Exterior work involved repairing the roof, painting, replacing rotten wood, and installing new light fixtures.Multiple contractors were engaged for the project, with licensed professionals handling electrical, plumbing, and HVAC upgrades.I have compared the comps in this area on Zillow and it’s in the range of 115k to 130k. all else checks out, except that I do not have boots on the ground to verify in-person.  

Tenants pay their own electric and heat, and for single family properties all other utilities.

We went with an electric murphy bed that actually rolls in and out of cabinetry.

The huge bonus of this property was it was coming with all existing materials inside including, condensers, lumber, electrical wiring, as well as pex and PVC for the plumbing.

Cost TrackerLot Purchase Price 20% - 15%Architect & Engineering Plans RenderingSurvey 1 (Stake Corners & Elevation Cert)Surveyor (Final Elevation Cert & Final Survey)County Permit Municipality Utilities District Portable ToiletFoundationSilt Fence Site Work (tree removal / 8in Dirt Scrape)Concrete SlabFramingLumberEngineering Wood Products (Trusses)Accessories & LumberFraming Labor $2.5 per sqftPlumbingPlumbing TurnkeySinksToiletsFaucets & Shower TrimElectricalElectricalHVACHvacInterior Windows & Material Back DoorFront DoorSiding, Sheathing & Cornice MaterialSiding, Cornice, Doors, Window LaborRoofRoof Deck MaterialRoof Deck LaborStanding Seam Metal Roof (optional)InsulationInsulationDrywallDrywallFirewallHang, Tape, Float & Texture LaborDrywall Touch Up LaborPaintExterior PaintInterior PaintExtra Cost (Caulk & Paint Upgrade)CarpentryDoor Handles CabinetsInterior DoorsBaseboards & Shelving (closets, utilities & Pantry)Carpentry LaborCounter TopsCounter TopsMirrors MirrorsGarageGarage Door & OpenerDrivewayDriveway Flat Work (AC Pad, Walkways, Steps, Backyard Steps)TilingTile MaterialTile LaborLVPLVP MaterialLVP LaborRailingRailingLandscapingLandscape Final gradeSODFlower BedDumpsterDumpsterApplianceseDish WasherStoveMicrowaveMiscMail BoxFinal CleaningHouse Plan PrintsWater & Electric During buildRefunds / DepositsRefundable Deposit