My advise would be to rent one for a couple of weekend or a week trip. a 1K investment for a trial is a lot cheaper than a 25 or 30K mistake.
JAyco are nice units, there are SO MANY others that you really need to get yourself a shortlist. When my wife and I decided we wanted to go from a trailer to a 5th wheel we looked at dozens. Found one we loved then looked at many more to make sure we had made a great decision. RV shopping can be lots of fun, just don't get too pressured.
As far as tow rigs, no one has ever said they wished they had a gas over a diesel to tow with. They may say they want to go back for other reasons but not when they tow. What you really need to do is keep an eye on truck payloads and tow ratings because numbers can really sneak up on you. It is a tricky game when you don't have one or the other and you will probably get lots of advise here.
Chris