FWIW, Suggest checking into Federal/local DOT rule changes before jumping into truck/trailer purchase, going too "heavy duty" puts you in a new ball park with them. "Generally" GVWRs of 10k# max. for each the truck and the trailer should be safe. Although some will not agree that these rules apply, it is you that may pay the tickets. "Out-of-compliance" status could also affect insurance coverage/claims.