Hmm. That's pretty much as expensive as a decent rear mount finish and a rotary mower combined. No cost savings then, just a different approach. I still might chat with my dealer about it, I don't really have that much need for a true brush hog as in 1-2" woody stuff, I just didn't want to tear up a new finish mower on the rougher fields.
...regardless of how well the mower functioned, the R1 tires would tear up the grass...
Have you actually had trouble running your 4710 on your 'good' grass and had the tires make a mess? Seems like a lot of folks assume that R1s will automatically damage a lawn. Now we're sure not trying to keep a really nice suburban-quality / fairway level lawn here, but we run our Ford NAA (for pratical purposes same size and more rear tire ground pressure (loaded narrow tires) as a 4710) over the lawn regularly. Unless it's sopping wet it's nearly a ghost and doesn't seem to leave any more of a mark than our garden tractors. In fact the one GT with turfs seems to make a more visible track than the other with bar tires. Now when a full-sized ag tractor has to cut through the edge of the 'lawn' (like a 10,000+ pound IH) to bale - that leaves some tracks. Regardless I want the R1s for other purposes but it will be interesting to see what it does on our local clay/lawn.
Tim