I have just a Medline rollator with seat that I got on Amazon. You can usually find them under $100. I use it pretty much when there's going to be a lot of walking like a convention. But I can't say I've gone off road with it and I have always had someone to push me when I had to use it as a transport chair. But it's easy enough for me to load into my suv by myself

Drive Medical Duet Transport Wheelchair Rollator Walker, Burgundy https://www.amazon.com/dp/B001FWY1JI/ref=cm_sw_r_awdo_navT_g_DRWGFT71T1H1AZR8J366 So I found my actual chair and unlike some rollators, it has little feet rests that fold out so you're not just dangling your feet