Do you have a towable car now? Or one you could put on a dolly?
You can find a good quality USED Class A for sometimes equal to or less than buying a truck and 5th wheel, especially if the truck is new(er).
There is no right or wrong. It just depends on your budget, what you find on the used market (and there are very good deals) and what you want to drive. You can get more for you money if you buy one 2 or 3 years old.
We full-timed 8 years very comfortably with a 5th wheel but absolutely hated driving the truck around to sitesee. We also had a travel trailer prior to that and again, the truck. We then full-timed another 8 years in a motorhome towing our car. We enjoyed it so much better.
Everyone is different. You'll just have to decide depending on your comfort level. Good luck!