Before I'd spend $$$ on turf tires I would want to confirm that turfs would not leave marks, too. While the tractor's weight will be spread out over a larger surface area with turfs, given how soft your ground appears, you may not be any happier with them. /forums/images/graemlins/frown.gif
This is one of the reason I kept my Wheel Horse Garden Tractor, i.e., mowing when the ground is too soft for my TC25D. It's also why I have been questioning myself as to why I bought a MMM in the first place! /forums/images/graemlins/confused.gif