Buying used or new is a personal and financial choice. We choose new and rely on the first year warranty and extended warranties for repairs. we had several problems with our bought new 06 Rv but between the Manufacturers warranty and the extended warranty it cost us @1,400 over a 7 years period including the cost of the 7 year extended warranty.
We never saw used Rv that meet our standards and we are not handy with repairs.
We did help friends of ours purchase a first time used Rv. It was a Dutchman TT in excellent condition and warrantied by the dealer. It was 6 years old and looked like new.