I need something to cut grass with my RC

Hi Guys,

I just finished with cutting our grass in the yard, but it's TERRIBLE work. I really hate it! I'm searching some "thing" which should cut grass, and I want to attach that "thing" to my RC car. (I will using my Rustler VXL) But my problem is that I don't know which thing I need. I already got an idea, I'll try to explain it with a paint draw:


It should look like a X frame where the motor is mounted on, and the motor is faced to the ground. On the shaft from the motor I want to mount a "thing" that will spin (by the motor) and by spinning it should cut the grass for me Well, my main question is: Which "thing" do I need? Do you got any ideas? It should be pretty big, about 625 cm² (100 inch²). And my other question: At which RPM should the "thing" spin?

I hope you guys can help me.

Thanks,

Patrick