Let me put it to you like this.
If it sounds too good to be true, it probably is.
Your best bet is to get a meat grinder with the largest throat and a large electric motor that can be reversedand a belt.
There is two reasons for that.
First off, when you grind meat, you are going to be grinding meat and fat and pork. The fat gets stuck in the grinder and you have to use the pork and deer meat to keep it going.
A high torque motor and a small pulley on the motor side and the largest pulley you can fit on the grinder side will produce more meat per an hour than a motor that spins fast and gets stuck all the time.
Plus, if you do happen to stick one of your fingers inside of the grinder, you can shut the motor off and reverse the motor and pull what ever is left out of the grinder.
With one of them TOY grinders, what you see is what you get!
If I didn't have a lot of money and still wanted to do all my own butchering. I would buy one of them combination machines that has both the bandsaw and the grinder in one machine.
http://www2.shopping.com/xPF-Northern_Industrial_Tools_Northern_Industrial_Tool s_Electric_Meat_Saw_Grinder_32525792