I got curious and did google it today, mainly to find out how much it cost. Looks like it starts at about 11,000 CAD plus tax and delivery, plus it requires some custom welding and fab work for the mounts. All the videos I found appeared to be digging in sand. And both the backhoe and front loader combined are over 1000 lbs.
You pretty much have to have a lockout kit added to the suspension to support it, but I have no idea how they they don't blow out tires from the weight.
I don't know about you, but I like my ATV's too much to subject them to that kind of abuse. I stupidly bought a pull behind disk and tried using that for a few year before having a revelation that "ATV's suck for field work" and bought a real CUT. For the 11k plus 6-11k for the atv, I could by a nice tractor.
I wont' even get into how top heavy and unstable it would make an atv....they roll too easy the way it is. Now put 300 lbs more than the base unit weights, above the center of gravity without a roll cage and I don't want to be anywhere near it.