I’d much rather have a 100 year old brick building with good bones (and updated electrical, appliances and plumbing) that was built by true craftsmen than a new stick framed house covered in glued together sawdust built with poor workmanship and controlled by smart phones but maybe that’s just me.

If it's an older building you will have a solid year or two of maintenance issues making themselves apparent (plumbing, electric and handyman type repairs). 

I was able to find three tenants and no problems with turning on their electricity within Lake Worth Utilities.

We plan to replace with tankless water heaters and in-unit high-velocity small duct central heat and air (using electric baseboard for the garden unit heat), and also remove all the radiators from the building.With the furnace and water heater removed, we would like to knock down the walls dividing the current furnace room, and make one larger rear, which is the bulk of the remodeling work to be done. don't not currently have drawings or architectural plans.

Check and see if they have water, sewer, and electricity near by or not. 

Other one was electrical work , where The loose breakers were checked and wiring was adjusted and validated if appliances are working.

Some properties are turnkey where factors can determine whether your knowledge base will suffice or you need a more in-depth view others are heavy deep renovations where it would be a best investment protection to know what you don’t know; possible septic issues, roof, mechanical electric... then it’s best to get a pro if your a pro or have one. 

@Giovanni Brown Get an inspection report plus get skilled tradespeople to inspect the plumbing, electrical, and HVAC if you suspect there are any problems, on an older home there might be.

Help see if we should go ahead with this triplex opportunity. 3bed/3 bath 1450 square feet.Currently in due diligence with asking price of $70,000 w/ estimated rehab costs of $80,000 including:-Asbestos Abatement-Paint-New Appliances for Kitchen and Showers-New Boiler/Venting system-Plumbing and Electrical -Header in the basement-New Windows-New Roof-Tree RemovalRents in this area for the single units (400 sq ft) = $700 and one larger unit (800 sq ft) = $900, total = $2300.  

Help see if we should go ahead with this triplex opportunity. 3bed/3 bath 1450 square feet.Currently in due diligence with asking price of $70,000 w/ estimated rehab costs of $80,000 including:-Asbestos Abatement-Paint-New Appliances for Kitchen and Showers-New Boiler/Venting system-Plumbing and Electrical -Header in the basement-New Windows-New Roof-Tree RemovalRents in this area for the single units (400 sq ft) = $700 and one larger unit (800 sq ft) = $900, total = $2300.