We just purchaced a "Theft-Proof " fishhouse trailer with a full kit. The guy there has the best frames I think on the market. He also helpped us out with the floor plan and gave us a pattern for the rounded front roof for the aluminum to roll over like a RV. Can't wait for ICE!! You can check the frames out on the internet www.fishhousesupply.com
They are also west of Mpls Mn near Buffalo. You can also order all your fish house supplies online at that website. Its worth checking out!!