What machine to screen sand from cobble stone

I own a quarter of land with cobble stone and under the stone is a deep deposit of sand. I have a market for the sand but it has to have no stone in it so the question is what type of screener will work for this. I am just starting out so my budget is small but I also need something with decent through put. I was thinking of a Powerscreen MK11. Thoughts? David

What machine to screen sand from cobble stone