Hi Bazzawill,
Here's a pile of food for thought from my experience (your results may vary) hoping this helps.
I have used trailers for hauling children, lumber, voting signs, wood chips, metal recycling, etc. For basic function any used one will work, just check that all connectors work properly and have no potential for accidents. Thule is known for quality stuff but I don't know anything specifically about this trailer.
But, the best by a mile that I have ever used is a
Wike. Designed, made, tested, manufactured in Guelph, Ontario, Canada by a wonderful gentleman who thinks like many of this tribe and runs his company in the most responsible manner I have ever seen. I have been using an older (no longer in production) model for about 5 years now and am thrilled with the quality of design, craftsmanship, reliability, and fold-ability, but mostly just on how well it works. (I have an old Norco trailer that I use for hauling dirty stuff but it doesn't compare.) Every time I use it I am reminded of how I don't have to think about the Wike because it just works properly every time. If I was buying today for two children this would be the model I would get:
https://wicycle.com/products/bike-trailers/premium-double
Yes, they use good bearings. The Wike that I have is an old model and works great. The model referenced above has even better bearings and design.
Giving a break to the partner is very thoughtful and necessary part of life. And kids love the trailer. Sometimes we go for a ride - sometimes we ride to a park and play there and then ride home.
Pulling a trailer with a cruzbike conversion kit was super easy for me. The hardest part is just propping everything up against a wall so that I can strap the kids in - but that is exactly the same as my road bike or mountain bike (both of which I have used to do the same thing, but the cruzbike is preferable because it is more comfortable.)
All that being said - I don't have a V - only the conversion seen in my avatar but my experience was that pulling the trailer slows you down but that is about it. Call it training. The steepest hill you can climb will be affected due to the extra weight being pulled.
You don't need suspension unless you are jumping potholes, rocks, tree roots, and curbs constantly - kids love the ride and 1.5" tires give quite a bit of air suspension. Pressures can be set fairly low with a low load (whatever max psi it says on the tire would be for if you loaded that tire up on the rear of a touring trike with rider + whole bunch of luggage) If the trailer seems to be bouncing around at all then the pressure is too high. I load up the kids and then balance the air pressure on either side so that if I push down on the top bar then the tires deform but don't pinch flat.)
The wheels need to be outside the pod where the children ride so that they don't stick there little hands in the spokes and other things only kids can think of doing.
With the windshield design of the Wike I have taken the 3 year old home from daycare approximately 6 km in the trailer at approximately freezing temperatures with her just dressed same as she would be outside normally - winter coat, hood, mittens, pants, boots maybe snow pants.
Anyway, hope that helps,
Benphyr