New plumbing, drywall, kitchen, bathrooms, added a Master suite and master bathroom in the basement.

one part says its only the outside structure and you still have to put in the windows, doors, roof, plumbing, electrical. basically all you have is concrete siding. you still have to frame the inside to install insulation and drywall. i feel its the same concept as container homes, a unique way to build but not necessarily a better revolutionary way. 

Acquisition $5kW/ foundation and plumbing in place Estimate to build $60kComps $130-$140k Could the new build fit the BRRRR method?

Some of this is dependent on load bearing walls I'm sure.For some of the work we complete as we'll need to change some of the electrical, plumbing, framing, etc. what's the best practice when hiring out? 

Completely redid plumbing and wiring to make it like new.

I buy appliances, lights, paint, cabinets, counters, final flooring,  cosmetic things.They buy wood, drywall, electrical stuff, plumbing stuff (except facets), nails, cement, blocks, roofing, etc.

Below is a summary of my position:1-performed $900 due diligence including: general+rental inspections (3 reports), plumbing inspection, and HVAC inspection2-property needs 25-30K in repairs (estimates from 3 GCs) 5,600 appliances5,000 flooring3,100 Basement3,500 Paint1,500 HVAC Furnace750 Hot Water Heater for one unit4,350 Electric: GFI's23,800 Total         3-36K(25% down payment and closing costs). 4-Total acquisition cost: 61-66K5-Expected revenue: 1700-1900. 450-650 net cash flow6-Great class B neighborhood I had a financial partnership that fell through because of COVID-19 recession fears.

They are very concerned about getting the estimate for the water bill right, but have given little consideration to capex items like a new roof, new plumbing, a new kitchen, windows or driveway. 

We started testing plumbing and utilities in upper units to find massive plumbing issues throughout the building.

A lot of those things could get by with one or two public restrooms(minimal plumbing), and solid electrical.