there were two trailers shown, one is a professional boat hauler, the other was what was hooked up behind my pickup, a much smaller trailer. That one is available locally for around $4K custom built. The one behind the semi, not going to guess what that trailer runs, probably in the low to mid 5 figure thousand dollar range! The truck and trailer was probably around $100K+!
You should be able to find a trailer like the one you showed initially for under $3G new and or way less used.
She drives me boat,
I drives me dinghy!