My wife and I own a 2014 UEV 490 that we purchased used. This is probably too late to help you out now, but the quality is very good, especially compared to the typical American RV. There are a number of touches that make me feel like they have done a good job engineering out most potential issues. There is room and ease of access to upgrade/work on the electrical and plumbing. Parts are readily available if needed, but you may have to order from overseas, depending on the part. You should be able to get most everything from Ohio or modify the trailer to take domestic parts. I like the simplicity of it. Everything is accessible and the Conquerors have been around long enough that there are forums with suggestions for upgrades, modifications, and tips and tricks.
One suggestion is to make sure that you lie down on the beds to make sure you fit comfortably. I'm 5'9" and have to lie diagonally on the front bed to fit comfortably (stretch out). On the bed where the table is, I have to lie on the bench seats with my head or feet under the shelves in order to fit. Extensions can be made for the bed on either, but from the factory, the beds are not set up for tall people.
Also, if you buy one, make sure that the water filler cap is either attached to the trailer or get a spare one. If you have any specific questions, feel free to ask.
Thanks,
Tom