Growing up we had a pop-up. We are on our third trailer since 2007 which included a 18ft Hybrid bought used(two pop-out beds but hard walled otherwise - 2005 Bantam flyer F18 by R-Vision
), A 2010 funfinder 189FDS bought new(full hard walled with a slide dinette - picture attached), and this year a 2019 Open Range 2504BH (bigger than you are looking for).
The Bantam Flyer was under 3000lbs but the tent end beds ended up being cold with a lot of condensation in the spring and fall nights. Also very noisy in busy campgrounds or anytime you were camping near a highway or other civilization. I can only suggest a hard walled trailer if you plan on using it year round.
The funfinder was a very solid trailer (3300lbs dry weight) and we had a family of 4 sleeping in there up until this year (8 years but it was getting tight with two growing boys) but had a separate shower and everything we needed. I would suggest looking for a 2008-2014 funfinderX 139 which is about 2100lbs dry and leaves you with some weight wiggle room for your stuff.https://www.youtube.com/watch?v=znOf7vTQt8U
Again, I can't emphasize enough how cold and damp (and noisy) a trailer with soft walls can be...especially for your year-round use.