Sometimes you just need to stop calculating and worrying about it and go camping. Get a pop-up or hybrid used for cheap. Plan on using it as a trial basis for a couple years and selling it. You won’t lose much if you buy at a good price, and you will gain a TON of knowledge and have fun doing it. Aim for a dry weight of 4000-5000 lbs and get what looks like it will work for you. If you can rent, do that, or maybe you know someone with a trailer similar to yours you could drag around for a little while to see what you think. I have pulled a lot of campers from a tiny pop-up with a Ford Focus to a fifth wheel with a diesel truck. I didn’t even think about going to a scale or calculating load ratings till I got on this site. Some combinations were better than others, but they were all safe. When it is all said and done, post some pictures and a towing report to let us know how it went.