I picked up a used MF 2 bottom plow earlier this year, needed a bit of work. It's a 12" bottom, pulling it with a 35 horse 4wd is a piece of cake. You might be on the edge of having enough weight and traction, I doubt HP will be a factor. Mine is a tight fit on the back of the Kubota, same problem Dill had. The front coulter is pretty close, but it has just enough clearance.
My fields haven't been touched in over 20 years, the only sand we have is at the beach, everything else is clay.
I don't know about the price... I paid a lot less than $500 for mine, but I may have got a really good deal too. Not sure how the Kverneland compares with the MF, but I've heard they ARE good plows.
If you have to buy a coulter assembly, factor that into the cost and see if it still makes sense. There are a lot of old plows around here, not many are for sale though.
Make sure you can still get points, most other bits can be fabbed if you have to.
Sean