It may be used to refer to general contractors, HVAC contractors, electrical contractors, or plumbing contractors.

Investor money (downpayment) came from a paypal software engineer and ceo of a china based pharmaceutical company. while in rehab (super ugly at the time), I rented each unit out for 2800 starting in January and collected first months rent and deposits for a cool 8400/month for the entire building.

I prioritize repairs by some basic criteria, starting with issues that need immediate resolution because they either cause continuing damage (leaks) or could result in injury (mold, holes in the floor) or just make working on the property easier (plumbing and electrical systems).  

I need to install Electric baseboard heat in 6 units and install 6 new electric panels and 6 new water heaters.Thanks,Saran

My background is in engineering and operations management. 

My contractor was able to get a mechanical, plumbing, electrical, and remodeling for around $2K.

I earned a MBA from Wharton in Real Estate in 2015 and earned a Professional Engineering license in Civil Engineering / Construction in 2013.

Also realized I didn't answer one of your initial questions:  They took my wife and I on a tour of various properties, one just completed duplex and then two homes that were in the process of rehabbing..both were torn down to the studs and we got to see the electrical, plumbing, drywall and rebuild stages.  

Definitely only get one that is separately metered for water/sewer and electric/gas.Renting a SFH is expensive but is preferred by larger families (2+ kids).  

You can use the search engine here on BP to find hundreds of ways people market for deals.