The message
from "TMC" contains these words:

Well worth the effort but I suppose it depends on how much you intend
to use
yours

There's a lot to be said for making your trailer yourself. Off the shelf
trailers are rarely good for anything except trips to the dump (barring
specialist things like canoe trailers and horse boxes[1]).

They're dead easy to make and you can fit 'em out to suit whatever
particular task you have in mind. I knocked up a 2' deep 4'x3' one a
couple of months ago to go camping. Takes the kit nicely leaving just
the bikes in the boot. I thought of putting the bike carriers on top of
the trailer but there was no need.
The trailer fits nicely inside the tent and provides a good solid table
for cooking - one which the wife and kids can lurch into without
spilling everything, unlike camping tables.

[1] you know how horse boxes have things like bow doors at the front
which open to allow the horse to see out? I'd never seen them open
during transit before but one the other day was and at 50mph the horse
seemed to be enjoying it hugely. Lips flapping in the breeze it was
leaning as far out as it could and I swear if it could have giggled it
would have.

--
Skipweasel
Pay no attention to that man behind the curtain.