I have a 3pt blade on my ferguson. I use it for grading dirt/land. It's not precision work, and it works great. However my b8200 is much smaller than my ferguson, but much larger than the b7100. It couldn't pull the back blade through dirt, even in 4wd, there just isn't enough traction with turf or R4 tires. It could do it in snow, probably. But 3pt devices tend to go back and forth a bit. This has caused me trouble with mowing with a 3pt mower and snow work with a 3pt blade. When backing up, it's a pain, and you don't always know which side it's going to shift to. So you'll either leave driveway area clear, or you'll be in the grass/dirt.
On the plus side, they make a 50" snowblower, which I have, which is a very worth while investment if you don't have gravel. My idea was the blade on the back, blower on hte front. It didn't work out as well as I had planned for hte brief snow I got to play with though.
Also stones, you're going to bounce over. they'll dig in, roll, and flip. The 3pt doesn't have down force, only it's own weight. I even put a piece of 3/4" all thread up and stacked an extra 200lb of weight on it to try and get rocks out, and it didn't go so well.
Regardless, it's a learning experience, and definitely a useful machine. Have fun with it, and be sure to post some pictures on delivery!
