I bought the grinder attachment for my kitchenaid 7 years ago. i had just bought the wife the kitchenaid. i used the grinder to grind up a pair of shoulders from a deer. No joke, burned up the mixer within 10 minutes. it's not made to grind a lot of meat. luckily, sears exchanged the mixer for me.

now, as far as the hand crank mixers go. here's what i did. I'll try to post pics later.
i bought the #32 mixer on ebay. I think that's the #. it's HUGE. it came with the belt pulley wheel to put on it. it was 35$ shipped. then, i also bought a 1 hp electric 120 volt motor on ebay for around 35$ shipped ( really good deal ) then i went to tractor suypply, bought 2 greasable bearings, a couple more pulleys, and basically reduced the motor from spinning at 1700 rpm's to around 70 rpm's. i mounted it all up on a board and for around 110$ i have a BADASS meat grinder. i'm serious, i've ground 2 deer that i had pre-cubed (entire deer) within 10 minutes. this thing is a grinding SOB.

For a couple of deer a year I would stick with the #32 hand crank. I process 4 or 5 every year and mine works fine. I usually do about 16 - 20 lbs of meat at a time. Just make sure that you know how to properly clean it. When I do 16 lbs the set up and cleaning take as long or longer than the actual grinding.