I don't know what I don't know of course (prior claims, electrical panel manufacturer, wiring etc.). 

Whether the home is 800 or 1200 sf you will still need HVAC, electrical panel, kitchen and baths etc.Be an interesting case study. 

It took us about 2.5 months to renovate the entire property including all the old systems (HVAC, Plumbing, electrical and roof along with everything else). 

Quote from @Bill Brandt: thanks for the clarification, the parcels being sold are "better than average" the parcels being sold are on a private lane,  with mountain views,  have natural gas,  electric, fiber internet, and cell phone service available. 

That includes the mortgage, the insurance, if there is any electricity the landlord is responsible for, if the landlord is responsible for any of the water and sewer, not all of those bills might be every month, some might be quarterly or twice a year like the insurance, and a small percentage set aside each month for vacancies, maintenance, and eventual capital repairs.

This includes electricity, water, gas, and any other necessary utilities.3.

Need costs: for rehab (roof plumbing electrical...), security cameras, track remote employees (they will steal the cash), cost to install pumps, license fees, hard equipment needed- registers, apps to run the register information, accounting, legal, cases for merchandise, shelves, door hardware, heater or HVAC depending on location...This is a tiny community there won't be a local plumber and electrician... add some cost for time to contact your team and travel will make any repairs more expensive.

(Other rooms too I’m sure) The options may not be as attractive and appealing on a flip as we see them for our apartments but I know our tenants love having the $35/month electric bills once we get done installing the LED fixtures throughout all the units we rehab.

Sounds like you'll want to sub out plumbing and electrical, it's not hard to manage two people's time like that. 

However, due to the leak, the water heater kept trying to heat water constantly and the electric bill doubled.