I have a 2 year old sailboat trailer sitting in the yard which is just
the right length and payload capacity for my boat. Unfortunately, the
beam is over a foot too narrow. Guess I'll have to sell it and get
another trailer the right size. I lose more money that way! :-)

I did have a curious thought, though. Increasing the useful length of
a trailer is commonly done, but has anyone heard of someone increasing
the width of a trailer? Getting the wheels further apart would
probably be easy enough, but what about the frame? Sounds like the
outside square tube would have to be cut off and new tube fabricated.
This wouldn't make much sense for a galvanized trailer unless square
tube is available already galvanized, or you paid to have it done.
$$$$ Either way it sounds like more work than it's worth.

Thanks,
Syl