I would assume it has plumbing and electricity hook ups.  

The laundry room already has plumbing and electrical for a W/D and there is a bedroom beneath so I won’t have to break through the foundation for drainage.

Mobile homes $45k each (includes installation, pad, electrical, plumbing and skirting)5 year warranty on each mobile home.Taxes are $1500 year for everything Insurance about $2400/year total Rent will be $900/month per unit.

Apparently there are five basic types of plumbing pipes per this article with copper being fairly common.

I will agree though there is a nonvariable time to plumbing, power installation, etc 

Some people will live in a place with leaking roofs, no heat, leaking plumbing, etc.   

We didn't get into the depth of details I'd like but I did talk with him enough to get some basics:*25-30 properties  Mostly SFH, with a couple commercial and MFH  One 30+unit complex rented out weekly as efficiencies*5 employees    Most are laborers   All maintenance is done by owner and employees (Roofs, plumbing, electrical, you name it)   Bookkeeper recently quit so books are a mess....not sure how bad but I know everything is done in cash with paper receipts.

We are closing on Multifamily in Kansas City, MO site on need on some major renovations (basement, plumbing, painting etc), any good general contractor recommendations?

-I then take the approved architectural drawings along with any specialist permits (such as electrical, plumbing or sprinkler) to the Construction Code Office of Jersey City in a folder/jacket.

Plumbing and electrical experience is a plus but not required.