You are in for a long road of excuses, guaranteed. See above by mytfal, that is spot on.
Guessing you picked it up from his house so you already know where he lives? If not, I can tell you.
I liked the trailer he built for me, other than his homemade axle I didnt really trust. I did not like dealing with him, his lies and excuses and extra 3 months to get the paperwork required for the trailer= very unprofessional. Buy a trailer from any other seller and you get the paperwork needed when you pick it up, that is how it normally works.
My buddy's trailer was a horror story that was poorly built and took more than 1 court date and a year to get his money back for a POS trailer that was not roadworthy.
Note- check your lugnuts regularly!!!!!!!
I hope you like yours and everything works out, but to all others be warned- the $$ you may save is not worth the headaches and builder not delivering or standing behind what you buy. Steer waaaay clear of this guy.