According to the descriptions over at Everything Attachments, the 48" tillers require 15-30 PTO HP. Just don't go too big.
I haven't bought my BX yet, so this is just from my research. I certainly hope it works fine since that's one of the uses I have for a tractor.
Yep, I'm in the same situation. Still making certain it will do what I want.
I have a Ford 3000 that may work with a tiller but it's 3,500 pounds or so and maybe closer to 4,000 pounds with the tiller. It also has 8 forward gears and 2 reverse gears. The lowest gear might handle a tiller but the engine has to run at 1,800 rpm's to get the standard 540 rpm's out of the PTO. Anyway, it's too heavy for the garden, IMHO.
Tillers require a very, very slow moving tractor with enough power to run the tiller too. Many, if not most, tractors can't use a tiller properly because they won't travel slowly enough with a high enough PTO rpm (540 rpm).