It sounds like you need to look at used TCs especially if you are interested in a Northern Lite. Don't be afraid of used RVs as long as you inspect them and do research. Most RVs are barely used each year.
I carried my Host 9 1/2 Double Slide camper in my signature on a 2006 F350 4x4 PSD. It worked, but it all depends on how solid you want your TC to be, and more importantly, how much weight you want to carry. The problem with being marginal is that carrying water, having full holding tanks, etc makes a big difference, and more of a difference than a light trailer.
Without mods, your rear will definitely be low vs modified. Before making any changes to that SRW, I carried my TC to Montana and back. It did ok. Do make sure your rear tires are at their maximum 80 lbs.