I've had my YM165D for 20 years now. It has built a house, a barn, a pond, done a decade of chores for livestock, and maintained half a mile of jeep trail in all weather. Plus cut hundreds of feet of 5 foot wide by 4 feet deep trench with the FEL - mostly through decomposed granite. I don't count mowing and backhoeing because they are easy on a tractor.
So far the repairs have been routine oil and filter changes, one set of brakes, one set of tire chains worn out, and it is now just finishing up it's third battery.
BTW, the front axle doesn't leak a drop. Never has....in fact just today I noticed that the typical leak point not only has no oil leak, it has a light coating of dry powdered rust on it. This in spite of my spending many hours axle deep in a running stream working on the stream bed and grabbing gravel with the FEL.
I'm not denying that the weepy axle seals aren't a common problem, but it just may be that if you have a good set and keep the maintenance up that your own tractor won't have a problem.