A truck camper, and a Northern Lite, are both good choices, and even better if you already have a truck.
However, we went from a truck camper to a small class A (25-feet) and love the extra room and the obvious conveniences that go with it. We were fortunate to find a used one with very few miles and in extraordinary condition. It had been in the same family all of it's life!
On the flip side, I guess, would be if you got to the point that you no longer needed an RV for work and decided that "RVing" wasn't your thing, you'd still have a truck.
Good luck with your choice. Stay safe and healthy.
1998 Fleetwood Flair 25Y--P30 Chassis - 7.4 L - KD5ALG
"When I was younger, I could remember anything, whether it had happened or not." - Mark Twain