First and foremost, mid sized farm tractors ARE NOT logging equipment. Asking them to do anything more than light, occasional woods work is going to tear them up. Quickly.
And that is really the situation neatly in a nutshell. All the attachments that you can get for a farm tractor are based on you using it as form of tractive power, or for PTO power.
I've seen tractors for sale that were used primarily in the woods. Like their owners, they're worn out before their time.
If you use them carefully, take a little bite at a time and don't get greedy, you'll do fine. Probably 25% of the time I spend in the woods is on road preparation and planning out how I'm going to get within reach of the trees I want. Driving over and through a foot of slashed brush and limbs from the last tree you cut is a recipe for expensive repairs.
Cleaning brush out of the road means I won't get it wrapped up in the chains and beat the hydraulic filter, wiring, and small linkages off the bottom of my tractor.
Taking one tree at a time means I'm less likely to get stuck, as does waiting until the ground is either dry or frozen hard. The wood stays cleaner, less wear and tear on saw chains too.
Tractors in general really aren't ideal for woods work, they're meant for open fields. I use mine for some light woods work, mainly firewood and clearing deadfalls, but I'm not in a hurry either. If it takes me a weekend to get a cord of wood out, that's fine. The winch does the hard work of getting the wood out or up to where I can park easily on the edge of a field or established hauling road, beating through brush and over stumps to get to a choice tree isn't an option as far as I'm concerned. The ATV with an arch is much more nimble and easier to maneuver around tight spots, but the wood is hard to handle without a winch attached.
Someone mentioned horse logging early on. If you can cut a batch of trees then get someone to come in and skid them out with horses, there's little to no impact on the ground, and it's interesting as hel* to watch them work. No skidder repairs, no tractor to buy, you might be on the hook for few days worth of horse work though.
Sean