Will you change out all the flooring?
I just went through this with my coach but I was leaving the ceramic tile that was in the kitchen and bath area. I went with the better quality Pergo Vinyl plank flooring from Lowes.
I also decided to do the two slides that I have along with the entry stairwell and the engine hatch cover in the bedroom. All this took time and because of the shapes resulted in waste.
All that adds up so I set up a spreadsheet with the length and width of each area. Added it all up and added 10% for waste. This came to ~231 sqft. BUT the flooring I decided to buy came in packages of 17.43 sqft/box, and needed 13.3 boxes.
I ended up buying 14 boxes and had ~1/2 box left so the 10% waste was about right.
Also, the trim was really expensive per linear foot and most of it was special order that I had to wait weeks for. It was about 1/3 of the total cost.
2002 Monaco Windsor 38 PKD Cummins ISC 350 8.3L
2005 Jeep Grand Cherokee w/5.7 Hemi