The same house on all 3 sites could vary by as much as 50% either way, for a total gap of 100% from lowest to highest.Realistically speaking, a house finished in industrial carpet, plywood and plastic fixtures, is not going to sell the same as a house of the same exact dimensions, finished in marble, plush carpet, and wall paper.

I've turned moldy nasty looking motel tile into new again.Also if anyone does their own cleaning GooGone and a plastic comb will take gum out of carpet.

RVs are made from plastic and cardboard.

Very important that you ask this question.When walking through the property, Look for a functional layout, Roof condition, Type of plumbing  Galvanized, Copper, plastic?  

I have several mobile homes on private land and they have appreciated more than my stick built homes.It is true that some mobile homes are built with cheap fixtures like plastic faucets, thin plastic tubs, cheap cabinets ext.

I am renting out some open space for stockpiling shingles and roof wrap, ice and snow guard, drip edge, coil nails, and plastic caps. 

They are in plastic and you can keep one in your back pocket.

Learn to love plastic sheeting.EPA lead rulesIn general, you just need to build the cost of compliance into your margin.

signsonthecheap.com  I use corrugated plastic rather than metal.  

Use metal handles for the cabinets, not plastic.