Make sure your tow vehicle is up to towing whatever you buy. Be careful. Threads involving towing can be like black holes of opinions. Carrying capacity is your usual limiting factor. My truck can tow 10,300 lbs... BUT I can only put 1500 lbs IN THE TRUCK when I tow. So, when you put a 500 lb hitch weight add 150 lbs of battery and propane tanks, people and dogs and anything in the back of the truck and a full tank of gas at 8.3 lbs per gallon, you suddenly are there at your capacity and you haven't even put anything in the back of the truck... and if you have an SUV, usually worse...
What kind of tow vehicle do you have? Longer trailers are easier to back up than short ones. Much easier. Short ones will give you fits as about an 1/8th of an inch turn on the steering wheel is enough to make them go sideways.
Always assess anyplace you are pulling into to ensure you don't get stuck or have to back out of some place with other people coming in...
They are all roughly the same quality unless you have money squirting out of your ears. Consider a one or two year old unit to save money and have the original owners work the bugs out. Buy new and YOU will spend the first year working the bugs out. BUT in 2021, the costs of used ones has gone up dramatically. I had a three year old 22 foot bunk house and was going to sell it for what I owed. The dealer gave me that in trade. Essentially I got to use it for three years for about a thousand bucks. Well worth it. So, new may be better at this point in time. My dealer put my 3 year old unit up for sale for the same price I bought it. OH, And with a new one, THERE WILL BE BUGS...
Look at RV trader for pricing information. Put the model number in and you will see prices being asked. You will see as much as 5 to 10K differences in pricing with the lower ones being in some cases deals and others used...Look. You will also see a bunch in a range. That is the general average. High price units will negotiate. Some dealers are easy to work with. Some dealers are like shady used car lot shysters...
Do you want a TT for you and a wife? Or a family? It is is just you, then having one main bed up front can work. If you got kids, a bunkhouse may be in order. Oh, those little dinettes they say you can sleep two in? Yeah, right if they are four feet tall and do not grow. Bunkhouses are few and far between under 25 feet and look carefully. Many bunks are like 28 to 32 inches wide... Trailers themselves run either 7 feet wide or 8 feet wide. I personally lean to the 8 footers as I have a pick up and good mirrors and sometimes they have full bunks even in relatively short lengths. It will give you more room inside.
If you can swing it, look at a "small" slide out unit. A slide out will give you a lot more room. My big labrador retreiver hated backing up in the non-slide unit. Cooking and other things can involve a chinese puzzle like approach like OK, you sit down, the dogs better be on the bed, She goes over lights the stove, you get up and move to the bed, she gets the pots and pans out until she finally tells you to GET OUT and take the dogs and you go poke tires or get the fire going or something. With kids...even more interesting.
Youtube is your friend for research as are most of the manufacturer websites with the 360 degree view functions. Many often say, get your second unit first as people often get what they think they need...realize its limitations three years down the road and get what they want... That's where my slideout advice/suggestion comes from... The dog really hates backing up...
OK, do you like to boondock (no electricity or water) or do you want the full deal and intend to have water electric and sewer every single time you camp preferably on a concrete pad...or a bit of both. This can influence your decision. Are you OK with one axle? or two? Remember always, your gray tank is your limiting factor. For example, a 28 gallon gray tank is good for about three days with at least one taking a shower a day. How low is the unit? If you go off grid, make sure your shut offs don't hang too low. You can do things like "flip axles" to get an extra five inches on some units...
Do you care about an outside shower? How about an outside kitchen? Want to hook up a TV outside? I do recommend a San T black tank flush. It helps...
Just a few of the things to condider...
