Hi Bryce and welcome to the forum!
The reasons your give are pretty much the same for most CT users, and there is no doubt that a basic CT setup is quicker and easier to deploy than a tent and associated gear (bedding, cooking facilities, etc). It's when you start putting up awnings, walls, extra flooring, kids beds, etc that the differences begin to erode but even then it still has many advantages over tent based camping.
Beyond the basic requirements of quick setup, decent bed, water storage; all of which you can find in almost any CT, there are a few more questions you need to consider...
- do you need offroad capability?
- kitchen?
- brakes?
- 12v electrics, lighting, etc.
You state fast setup as your top priority, and don't mind a smaller size tent. This suggests a hard floor model, but these a usually more expensive than soft floor and except at the higher end of the market are typically less rugged. A soft floor will get you a more rugged and better quality trailer for the same money but is more fiddly to setup and pack away.
My suggestion is if you want a rugged offroad CT then look for a soft floor Australian made with about 9ft tent. You can easily find near new second hand CT's in this category for under $10k. Even brand new there are several aussie made options on the market at that price, and of course a multitude of imports.
Good luck.