Hi,
I had a solid Bintel 300 mm dob (none of that imperial cringing at my place) and it was a big heavy beast, not very portable at all, even less so if you fit it with Argo Navis or something (takes more care).
I trundled it around at home on a hand trolley, and this was quite a good thing. When I took it somewhere, that was a major production as I have a sedan, so a wagon would be much better. You might like to carefully measure the length of the OTA and diameter of the base to see where they would fit best.
It would always arrive and set up to be miles (no, kilometres!!) out of collimation, but then so would a truss dob I guess, so no difference there.
A friend of mine has a 250 mm Lightbridge, and (although he is not the most patient person I ever met) it always looked to be an irritating amount of fiddle to get it assembled. And then the collimation had to follow. The cigarette butts down there did not help either.
In all, with the considerations from others here, I would buy a solid tube 250 mm dob, and make sure it had a 2 speed Crayford focuser, strong collimation springs, and Bob's Knobs or similar.
As to the collimation, I greatly liked using a barlowed laser, but there is a wide variation of opinion in that area, so I will register one vote only
.
Cheers