I think a backhoe attachment for a tractor is worth it, just that it cannot be justified for land clearing. That is a tall order for any tractor: best to clear the land and rent a big excavator.
But, the thing about attachments is, once you have them, you use them for so much. I use my backhoe for putting tires back on their rims, or breaking down the bead. It is like having two extra people around. The outrigger helps hold the tire down and keeps the tire on the rim as I use the backhoe to push the rest of the tire onto the rim. It is a difficult job to do alone, but easy with the backhoe.
Should a person go buy a backhoe just to put on a few tires...heck no, but if you got one, you can use it. It is collective small jobs like this that make them worth having.
Like putting a waterline to my barn. It was such a small job that you cannot hire a person to do it, and while renting an excavator would work, it would still be $450. With my own backhoe, I dug it for a few bucks in gasoline. It is nice to do a ton of work without having to use a shovel.