Also need new line-sets and ductwork on 1 of the 3 units.

@Charlie Moore We do a full video walk-thru on every property our clients write an offer on...always starting in the basement or crawl if available...we look atFoundation for signs of deterioration of damage, or signs of water intrusion or settlingHot water tank or boiler...basically just age and general condition hereHVAC/Duct work...age of system and type of duct work...looking for asbestos wrapped joints as well...and possible code issue with gas linesElectric panel- to make sure its updated and there are no obvious issues...Floor joist to make sure none are sagging or crackedExterior we look at all componentsRoof- general age and number of layers if its shingleGutters and downspouts- for damage and drainage...water needs to get away from the house and foundationSoffit/Fascia- for obvious damage or wood rotSiding- general condition and damageWindows and doors- general condition and functionGrading/drainage..porches and sidewalksTree location and possible root damageInteriorGeneral condition of flooring and walls/ceilings for any damage or defectsElectrical fixturesPlumbing- supply and drain lines...as well as condition of fixtures (faucets and shower/bath)Proper ventilation for ranges/stoves/bathrooms with no windowWobbly, leaking or broken toiletsCondition of appliances if availableAtticVentilation through ridge vent or whole house fanRafters/trusses in good shapeRoof decking for signs of damage or water intrusionLevel of insulationHazardous materialsAsbestos Underground storage tanksOh, and make sure the door bell works ;)This is just a first pass before we decide to go for inspection where we'll get more detailed...looking at all this stuff usually takes 15 minutes...pretty easyGlad to chat more...there is a lot not covered here

Usually asbestos was used around furnaces and ductwork and 9x9 floor tiles.There are companies that remove asbestos and mold. 

There are a couple other components, separate HVAC systems must be in place with no shared ductwork, to illuminate sound transfer between the units, also the smoke alarms must be tied together between the units. 

city...https://www.trulia.com/p/oh/cleveland/1963-w-47th-...https://www.google.co.il/maps/place/1963+W+47th+St...https://www.zillow.com/homes/1963-W-47th-St,-Cleve...Number Each Investor House $80,000 Investor 1 $ 90,000.00 Closing costs $1,500 Renovations $130,000 Investor 2,3 $138,000.00 Project Management $10,000 TOTAL $221,500 Sell Price $320,000 Costs $16,000 Iintrest $8,000 Net $74,500 Cash on Cash Investor 1 $24,809 28% Investor 2 $24,809 18% Investor3 $24,809 18% -22 squares roof (probably as many as 3 layers budget for that and re-sheath) $6600-Windows/Ext Doors (currently 20 windows and 3 ext doors) $5000-Siding/gutters (28 sq siding) $12000-Driveway/ 2 car garage (driveway 132’) Drive and pad appx 7k, garage 7k, wire $14000-Demo (labor/dumpsters) $5000-Framing (lumber/labor,floor leveling and sheathing) $6000-Insulation $4000-Wiring and light fixture (all new service) $8000- Plumbing (drains and supply and hwt and faucets) $8000-Hvac (hvac and ductwork) $7000-Foundation repair (parging/loose bricks/drylock) $3000-Drywall (sheetrock/taping/finishing level 4) $12000-Painting $5000-Millwork (doors/baseboard/casing) (solid doors 10?

This doesn't include the cost to enclose the ductwork in drywall.

We put some in the air conditioning duct work as well, I think that helped get rid of the smoke smell that would circulate through that system.

HVAC if none was there, means adding; Ductwork throughout the house, Framing to box it in, drywall, and finishing.  

With the gas line already run into the house, the question would then be whether or not to keep the oil, get a gas boiler, or bring in a gas furnace and run ductwork for forced air.  

Last weekend they were helpers on the HVAC installation , new heat pump and duct work .