GVW is Gross Vehicle Weight, Not what it weighs, what the max weight it can be including vehicle & load combined including people & fuel. The weighmasters carry scales & can weigh it on the side of the road & if you title it commercial you'll have to go thru any weigh station & over a scale. I'm in Michigan across the line where the build the crappy RVs in Elkhart, Goshen, etc. I've been in several plants, have several friends working in the RV plants & most use the cheapest material, piece work labor as they are made to use 2-3 weeks a year not live in full time. Watch this
https://drivinvibin.com/2021/05/16/rv-technician/ If it's a pickup it's not commercial in Michigan.
Here they still call it a chauffers license for 26,000# & under commercial & a CDL for over that weight.