Wheels come in different types and sizes. But a wheel that suits the driving of a Tractor is new. It can also be used for driving a truck.
I actually like the joystick/buttonbox addon panel. Even if it is made of cheap plastic. You can use something like that for many purposes and i hope they sell it separately as well. Price for the complete unit will be around 300€ so don't expect high end stuff. But for immersion they went a different direction than most other wheel manufacturers and i like that.
http://store.madcatz.com/farm-sim/
Price for just the button box with joystick will be 150€.