I
quality 5x10 trailer would be fine for hauling a
B2620, especially if you left the loader off. In fact, the small frame B-series can be easily hauled in the bed of a full-size 8' bed pickup (I've hauled a
B7610 in the bed of my F-250 before.) With that said, the trailers at TSC are not what I would call good quality. They are built pretty cheap, you'd probably bend the tailgate when trying to load it. If those at TSC are all you could afford, give it a try but be sure to put extra support under the gate and back of trailer when you are loading it.
The nice thing about a 5x10 trailer is it is big enough to haul the tractor, but also a good size to pull behind a tractor that size. If it will only be used to
occasionally haul the tractor (minus loader) then I'd say it might work. That being said, I haul my
B3200 on an 18' long, 8000lb equipment trailer, but I'm hauling it about every week. With the loader and a 3pt attachment 18' fills up fast.