well thanks for looking and the trailers and giving opinions i suppose cause i said some trailers had problems that everyone noses got outta joint
If no one has tried them Bardynt then how are they to respond to something they have no clue about. When buying my trailer I looked at all that was available but it took allot of web surfing to get decent reviews from users of the varies kinds and many of those in your list no one had credible reviews except the Burley Nomad. Most of the trailers you can't even eye ball let alone touch in this country so that makes it even harder.
I personally think from your description you gave a two wheeled flat bed type trailer would suit your needs better because of the options that it would handle or be fitted with. Now to carry a large payload for around town or touring the Y-Frame trailer is built to handle that but in my opinion the flat bed Burley lacks the weight carrying capacity and has small wheels which I find an annoyance because the 16" inch wheel lacks spokes. plus the hitch is known to bust over time or any time it's subjected to high stress (Common problem with trailers that use the same style hitch).
Somewhere in this thread I gave my opinion of the Y-frame which is the trailer I choose to use it can be brought from CRC
for about 240 clams delivered and is one tough sucker. Tell us what crap you want to carry and how serious this touring is you want to do because if you want to carry long stuff many folks threads I have read about the Bike at Work trailer have been pleased with it's ability to cater to there domestic needs but for touring I wouldn't touch it.
The Bicycle Trailer Steel trailer on ebay
for 219 clams in my opinion is money down the drain when you can get a quality Carry Freedom Y-frame for a little more which both are flat beds just the ebay
one has sides. You could custom make the sides bigger or smaller on the y-frame.
The croozer on ebay
no one I know uses that model and I have never seen anyone around with it so that might go along way about saying something towards it.
The Roland Jumbo I never batted an eye lid at because just the design I knew it wasn't for me so that is all I can offer there.
Hope this helps a little.
PS bardynt the only problem I have read with any two wheel trailer axle has been those with quick release mechanism but that comes down to lack of maintenance on the owners behalf. During wet weather the locking ball can become jambed but that is only if you don't keep them oiled or greased the water will rust them a little and make for removing them harder. Out side of that I have not herd or experienced nothing as you have claimed to weak axles. I even own a cheap kmart trailer and that thing is running sweet but I wouldn't go loading that up with great weights it only does my shopping nor would I tour with it.