According to the specs, it is a fairly light tractor.
www.tractordata.com
ROPS Operating weight: 3836 lbs (1740 kg)
Cab Operating weight: 4078 lbs (1849 kg)
Length: 134 inches (340 cm) (11 ft 2")
Width: 71.5 inches (181 cm) (just under 6')
You'll have to add the size of the brush hog and the bucket. You should be able to take the measurements.
If you add 1000 lbs for the bucket, and 1000 lbs for the brush hog, you're still under 7,000 lbs.
No need to get a monster equipment trailer.
I've been generally satisfied with my 10K utility flatbed. I am worrying about the weight a bit when loading it, but bumping up to a 14K trailer would impact my tow weight, and probably also impact my taxes. And, even the tow vehicle.
Mine has about a 7x18'2" bed. (That 2" is important).
I don't remember hauling my tractor and brush hog, but I've hauled a lot of stuff on it. If needed, I'd disconnect the brush hog, and load it under the bucket.
I'm quick to throw on a red flag if needed, but I don't think I've flagged my tractor.
Edit:
Part of your decision will be whether you're purchasing new or used. Or, perhaps even built to spec.
On the used market, you'll have to have some kind of a minimum standard, but may make do a bit.