trailer axles have a bow built into them, if they got turned over and the bow is the wrong way, that would explain the excessive wear on all the tirs, usually an alignment problem doesn't wear all the tires the same. Just a starting point for you to check to try to resolve your problem.
05 Alfa Gold 40' Motor Home "Goldie",
03 Malibu Toad
in a 24' CargoMate trailer.