If the sky's the limit, take a look at the ski slope grooming tractors. Those crazy things are just that - crazy. Take the front blade off and they'll climb about anything.
![[Linked Image]](http://image.shutterstock.com/z/stock-photo-a-snow-groomer-in-the-swiss-alps-74018869.jpg)
I drove one of these grooming ski slopes a few years back. They are practically unstoppable. I worked for a small resort with a tight budget and the groomers had a gazzilion hours on them and were a maintenance nightmare.
You may be able to purchase them cheap used but they will likely be worn out.
