I insulated the Trailer (walls and ceiling) and used expanding foam to fill the gaps.
I had it weighed on October 15th 2020 with everything inside that was in the video, it came to 2920 lbs. Starting weight was 2160 lbs, so I only added 760 lbs.
TOTAL COST: $7200 $4000 for the trailer. Around $3200 for materials