Trailer rego is easy as here.
You build it take it in for warrent of fitness.They check the trailer over as if for normal warrent.
Then you fill out registration papers and they issue you a numberplate.
If they trailer is branded professional build they put that on registration.
Otherwise it is classed home built.
First seven years you get one year long warrents and there after 6months long.
Process costs $90 New Zealand for warrent rego and plate.
After that its about $65 per year.
These are my van mods for taking bike now.
front tyre
front skackel one of two
Mid rear shackel. Seat removed so seatbelt is redundant so dont panic.Note the shafts are linkage bars from fzr250 bent.LOL. Had to add some class.