What kind of camping are you planning? I rebuild and repair all sorts of pop-ups and don't see to many that will take rough roads and stay together for to many years. Stick and staple construction is what we call it. Some of the older trailers used sheet metal and tubular frames that aren't as susceptible to rattling apart.
Also, things they put into these newer units are a little strange to me, from a practicality point of view, such as an indoor toilet and shower. An outdoor shower stall and porta-toilet allows the use of the trailer even when someone has to go poop without gassing every one and offers a higher degree of privacy and more living space.
Additionally, Fleetwood used to make their pop-ups in Rialto CA under the licensed name of Coleman. These two companies sued each other for several years with Fleetwood losing. I don't know the particulars of that but would seriously question a start-up "Neon" model. You might be able to search out a second hand Fleetwood Scorpion which was marketed as an off-road trailer. These were a little stronger build.
I suggest you shop Craigslist and don't, I repeat, don't, buy the first one you see. Things that will always need to be R&R'd are the up and down components so I would plan on doing that before going out. Clean and disinfect everything and replace the tires. Four years old max. You can find these on the shelf at Redneck Trailer Supply and Wally World for about $85 each including rim.
I have a 1984 Coleman on the rack now that the customer paid $700 for. The up and down system is being converted to an electric winch for $650. Sweet deal and he will have less than $2000.00 invested after it is all dressed up. An employee of mine just hurt my feelings yesterday after he paid $200 for a 1999 pop up purchase at auction from a storage facility.
