I read the fine print but I interpreted (mis evidently as per your description) that a bit differently I suppose. I believe you are stating the 10k trailer restriction as strictly dry/standalone or maybe even GVWR weight but I read that as loaded for road use. Take my 13,000lb 5'er for example. Put my rig on the scales and it'll read 4540 on the steer 6360 on the drive and 9660 on the trailer. That's less than 10k loaded but 20560 gross combined. You're OTR Commercial up there so you should know! That's just terribly restrictive. Guess there's alot of fifth wheel rv'ers up there with their CDL's!
It's pretty incredible with the way that you're describing it there is pretty much no reason to even buy a 350 in OR without a CDL b/c you really wouldn't be licensed to haul any more than a 250 is capable of. Heck the new F150 can pull a 10k trailer, why buy a 250! (rhetorically speaking of course, I want my PSD and stability!)