Bill of Materials
Every part you need for this camper is available online.
This spreadsheet will give you all of the quantities, prices, vendors and part numbers for every single part you will need to build the camper.
Full Sheet: https://docs.google.com/spreadsheets/d/1XIEhFNm1w2Kz08wZ4rQJW5V6W8wPFXCxf1OkICbWpbc/edit?usp=sharing