Hi Lisa! I'm 6'5" so I can relate! Tell your hubby that the interior height isn't really as much of an issue as bed length. Right now, the only trailers that come in under your specs with adequate bed length for him will be a Burro
17' wide body (no longer manufactured) and the EggCamper
. Unfortunately there are very few EggCampers on the used market, and those that are are out of your price range. Look for a Burro
I currently have a Bigfoot 25' rear queen with an 80" mattress in it that I love, but at 5300 lbs dry, it's heavier than you're looking for. Neither the Bigfoot 17 nor any of the other 'regular' egg trailers will have beds long enough to be comfortable for him (except one Casita
I had a burro 17 several years ago and enjoyed it. I'd buy an EggCamper
in a heartbeat if I had the same towing requirements you have.