I had the tractor on two wheels .
Within the first two months of owning my tractor I was using the loader.
I had some experience with equipment so in no time I was zipping around moving dirt. I had the bucket up to dump and backed into a small hole.
In 2 seconds the tractor was on its side and I was on the ground swearing.
Scared the crap out of me. I now have a ballast box when using the loader or a box blade to keep gravity on my side. The only plus side to this story is that I have turf tires. Nothing but the bucket touched the ground....and the top of the ROPS. All the scratches were on me, not the tractor. No damage to the engine since I was able to kill it quickly. A few fluid leaks and that was the extent.
Amazing how much more careful and mindful of hills, holes and obstacles after that experience.
And as far as the zero turn goes....I am thinking of the Cub Cadet Ultima series.