.$25k in materials and laborMonthly holding costs: $557(int payments, taxes, utilities, insurance)House info as purchased:House built in 1971 - Solid B neighborhood - Great Schools2081 sq ft4 Bed, 2.5 BathNew RoofNew WindowsNew HVACVinyl SidingWork to be performed:New cabinets and counter topsLaminate downstairs and carpet upstairsNew vanitiesNew light and plumbing fixtures(tubs staying)New water heater Paneling removed from den and replaced with sheetrockWindow removed from eat in kitchen and replaced with slider to access the back yardSmall deck built off of sliderAnd obviously paint throughout.We will probably price it under market value and hope to sell it quickly(30-60 days) at $125k which would give us a profit(after commissions, closing costs, and carrying costs) of $22k-$23k.  

The home has electricity and plumbing in a 600 sq ft. unfinished attic which we intend to convert to more bedroom and bathroom areas.  

HI @Dawn Brenengen I am looking for several contractor recommendations in the Raleigh area for these specific trades: Plumbing, Electrical, Roofing and Drywall.

So adding on a kitchen and bath may literally require whole new plumbing because mobiles used old style plastic cheap stuff that rots away and you can't fix or add toi. 

My concern is that when I get the foundation repaired , the plumbing is going to break .

It has been a KISS method that has worked out really well for me and kept me from screwing things up, which I am sure would have happened if I would have tried to have been more Geek like in my approach.  

Since there are hundreds of opinions of the best methods, I'll share with you my current strategy.  

Here is my simple really quick rehab interior estimate method.  

Great suggestion Aaron.Although I'd probalby still have to use the ol' numbers,l on a napkin method lol!

It's a calculated decision based on at what stage and condition the building is in.For retail if there are no demising walls yet and it's in a cold dark exterior shell condition the all in costs for putting in walls could be 35 to 40 per sq ft with plumbing and ceilings etc.If you have demising walls already could drop to 25 to 30 a sq ft.