Just got back from my trip. Did 10,000 miles on the red harbor freight trailer frame. No tire blowouts, no problems. Was very excited about it. Camping in the desert with the three speed fan and the small window on my door created an awesome cross breeze. My first teardrop held up! For those interested....
https://www.youtube.com/watch?v=dRuomToeeKUhere is a video of my 10,000 mile journey across America, including 12 National Parks.
Thanks!