A 30' trailer of laminated construction uses @ 70-80 sheets of plywood or OSB of different thicknesses. Plywood and OSB have increased in price by @ 475% since Jan 21 2021. Oil has increased @ $20 per barrel in the same timframe which is used in the tires and seals, foam insulation, plastics, etc. Shortages of steel and aluminum abound. Dimensional lumber is up over 300%. There is also a shortage of workers. Why would I want to work in a fast paced RV factory getting paid by the piecework model, when McDonald's and Walmart are offering $15-$18 per hour, a $3K sign on bonus, and another $2-3 per hour if you stay for 90 days?
This is what some folks wanted, they got it, now enjoy it. You haven't seen anything yet, this is just the preliminary fun.