You said "blue boxes" so it's plastic junction boxes and they are typically installed say 1/2" proud of the stud face, the rotozip would need to hit the OUTSIDE of the blue box and go all the way around. 

And DO NOT let them put in an above ground pool either (unless it's one of the $20 plastic ones from Walmart). 

I've also just learned about inserting a new plastic pipe inside the main and epoxy lining all the pipes.

Yes, he had LIVE exposed wires twisted together with no plastic cap hanging in his shower for years.   

After this was done we put down 14mm plastic under the house as a moisture barrier.We dug a French drain around the front of the house back to the creek to help with any moisture issues under the house.While we were under the house we also replaced all the plumbing with brand new pipes.Both bathrooms have been completely renovated with the master getting a full custom tile shower and the other bathroom getting a soaker tub with custom tile surround.

Paper or plastic?

I don't know if it's a law or not, but when I rented an apartment in VA a few years ago they had changed the toilet seats and left the plastic on so we would know they were new.I researched the cost, and at ~$12 a piece decided to do it when my rentals turned over in NC.

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.