No. What you have to decide is how much money you want to spend on it. From there... you start choosing it down to fit what you're looking for. You can buy one for under a grand or you can buy one for $300,000+. What's your budget. Also factor in your rebuilding skill level into the costs if you go that way.
Well, that is very true, however, when you are buying from a dealer, the first thing the dealer will ask is, "What kind of vehicle you have." They know by the type of vehicle you have. Year, model, and engine. The larger it is and newer it is, the more towing weight the larger your vehicle needs. Of course the dealer will ask you how much money.
To determined what you need, you need to keep in mind the size, the cost, how well it is built, things like that. You know how much you want to spend. Then you have to remember that the Dealer will add on other expenses such as what it is called, "Document Fees" plus shipping fees, as well as prep fees. Quite a bit of expenses. If you want to be budget minded then you are better off buying a used one perhaps from a private owner than a dealer. True!
When you are a dealer, first they ask you the size of your vehicle then budget right off bat. They should know their inventory. We have two RVs and I made great deal with a dealer buying a used one for 2500 dollars, a 2001 Prowler with seven YEARS of winter storage FREE thrown in the deal WITHOUT trade in because we love our 2005 Scamp 13' Trailer. We needed a bigger one for guests but also for study for our company.
So, play hard ball with dealers like this.
To find out used vehicle weight, research about it online such as Kelley Blue Book for the value and weight as well. Since you are buying travel trailer and not a park trailer or a manufactured single-wide and use as live-year-round, go for slide out models. There are many slide-outs available. Remember, with Slide-outs, they weight more than non-slide-outs that are made for weekenders.
A little educational tool for you. GVWR means Gross Vehicle Weight Rating is overall weight including full tanks of fresh water, grey water, and black water plus your own needs in the trailer. Dry weight or shipping weight (depends on manufacturers say on their website or brochures), that is what you need to know for your vehicle.
What kind of vehicle you have? Yes, I am asking you! Haha. I can be a big help for you if you want to. Please contact me privately in here if you need to ask privately or be in the open here.