I know in Florida it is easy to register as "Home Made". It does not matter who built the trailer. My trailer was a REPO, I bought off craigs list. Went to register, but I had no registration. They would do nothing with the Bill of sale without a current registration. My buddy who build trailers told me to go have it weighed at a certified weigh station, which I did. I took the weigh "certificate" to the tag agency and told her it was a home made trailer and gave her the certified weigh certificate. It was a piece of cake. Now my rergistration say "Home Made". Good luck.