I travel light too, not as minimalist as lbs, but no living quarters!
My first trailer was a 16' stock. Some plastic & duct tape turned the front into a nice big sleeping area & the horses used the back. It worked great but I got a bigger horse & needed a taller trailer.
So now I pull a 2 horse Brenderup, the smallest model without a tackroom, with my 2003 F150 4.8L 2 wheel drive. I have a truck tent that goes over the bed of the truck, or I set up a cot right in the horsetrailer. I have a solar shower for washing up, and eat food that doesn't need cooking
I recently purchased a 1999 custom van that has an actual folding bed in the back. It's very comfy to sleep in, and once my teens move out I plan to pull out the middle seats for more space for tack 'n storage. I also plan to put an awning on it.
I love my Brenderup because it is so lightweight, and easy to manuver anywhere, but tall enough for even large horses.
Those big living quarter rigs look neat, but they are very pricey, plus needing a biger truck, plus more parking room, just too much trouble just to go ride & camp a night or two.