Can’t address your question on tow vehicles --because of that I suggest you take yourself to the nearest truck/car dealer and ask there --but do go to two or three —of course they will each try to sell you a vehicle, but listen instead for the information on suitable towing vehicles --you’ll start hearing the same things about engine size, brakes, shocks, mirrors, tow packages etc.
Now for my real reason to respond --while wanting to “haul everyone and pay it forward,” that is a noble idea --I had it too when I was a kid and had to go door-to-door around our farm begging people with horse trailers to take me to 4-H. I said if I ever got a trailer, I would haul anyone who asked --ok fast forward to when I am a trailer owner —and I did that.
Problems: people who expected me to load their horse (and often the horses would not load) making me late for whatever I was going to. People who sent their horse and child with me then showed up late to the show or whatever expecting me to supervise child and horse, put on saddle, bridle, etc. People who asked me to take said kid and horse home --and oh, would I mind feeding their other stock so they could stay longer. People who blamed me for injuries in my trailer --one even said I caused it so her kid’s horse couldn’t show and my kid would win --they refused to wrap or put boots on the horse, and he cut his own leg with his shoe scrambling to get out of the trailer. No one ever helped wash the trailer after --no one --ever --despite me asking and offering to pick up said kid to do it the next day. People who complained I had a ramp (when their horse wouldn’t load) people who complained I didn’t have a ramp when their horse wouldn’t load. People who expected me to load their stuff and make sure it was all there --my fault if they forgot anything --people expected me to provide filled hay nets for the trip --and the worst --people whose horse damaged my trailer and said, “Well, it’s horse trailer --fix it if you want to.”
To this day I am still asked if I would loan my rig --no. no. no. And I don’t haul for anyone --ever. Before you start hauling for folks, you might check your insurance --if someone’s horse gets hurt in your trailer --are you responsible for the vet bill?