Does the wall have wiring, plumbing or HVAC that will need to be rerouted for example?

Maybe it's hustle and deal finding, driving for dollars, gopher work, a background in contracting, a plumbing business, great at deal analysis.

Also, some old lead plumbing. 

Framing for the slabWe started with the slab- which included having to really commit to the layout in order to lay down the plumbing.

After a full gut job - (new roof, windows, 2 kitchens, bathrooms, floors, electrical and plumbing) I have a 2000sq foot home with a 1200sq/ft, 2br/1ba main home and an attached 800sq/ft, 2br/1ba ADU.

this place is full of bad plumbing and mold.

I need a contractor that can complete plumbing and electrical work, and brick work along with other exterior and interior projects. 

There are a lot of factors that need to be evaluated when considering multi family (Separate meters, age of roof(s), a/c's, what is age of property, could it have poly plumbing, Chinese drywall, federal pacific electric panels,etc. 

In terms of the house itself Details that help are- when was the following things replaced- roof- electrical-plumbing- AC- Water heaterWhen was the kitchen and bathroom last updated?

Regular rate the plumbing co.