On the topic of ground clearance, at first numbers, it doesn't look like the PTs have much. However, it's really hard to get them stuck. I climb over 8" fallen logs very often with my little PT425. I've never been stuck in sand or mud. For that matter, I've only been stuck once in 21 years.
I was brush cutting downhill in an area of my property that I've only been into twice since 1989. There was a large log across the slope that had filled with sand and debris on the upside that made it all but disappear from the upside view and covered with thick brush. It was over a foot drop-off on the other side. My brush cutter was not in float because I wanted more traction. So my first inkling that something was wrong was when the front tires dropped off the other side of the log, and I was high-centered immediately.
I tried pushing the FEL arms all the way down to lift the front with the cutter deck, but I ran out of down travel before the deck could touch the ground.
Had to walk back to the truck and get a shovel and chainsaw. Dug out the log on both sides of the PT so I could saw it off on both sides. Once I was through the wood on both sides, I hopped back on and drove the rolling log piece down the hill further until I climbed off of it.
All in all, I'm very satisfied with the single machine that I have.
I might enjoy having a skid steer, or small excavator, but for now, I just can't justify the cost for the only occasional use I would have for it.
I have rented a small excavator in the past for a weekend rental. Well worth the money.