As I understand it, as long as you have a pto and linkage, it can be registered as a tractor, no matter what it's used for. The argument usually comes over the fuel, plus you have a limited milage from your base on red.
I agree, white and make sure she is legal same applies to all tractors. If your off-roading it buy a 416 or a u800 the 406 is nose heavy and she'll hand stand on you !!
Moose