LEM makes a good grinder. Parts are readily available should they be needed. Its been a while since I bought mine or looked at them but would guess they are in the $250-$300 range for a 3/4hp. You can do with a 1/2hp, it would just take a little extra time. Let the meat chill in the freezer for 15-20 minutes before grinding. Firms it up and it grinds easier.
I sold my high priced grinder a few years back and bought this smaller one last year. It performed quite well. I just ordered a second one since they are so cheap and it will cut my processing time in half. I was very surprised it didn't bog down. Read the reviews and you will see what I am talking about.
I bought the LEM #8 about three years ago and I love it. I ground 200# on Tuesday night. This grinder has never gave me problems yet. I can't keep up with it. As fast as you dro[p the meat in it is already out the other side.
I have one that they sell from Bass Pro, had it 11 years and still grinding strong. I have done as much as a 1000 lbs in a season (deer and pork)
We have also used it for the Local Little League to grind briskets for Opening day of LL(150 Briskets) 3 years in a row plus briskets for my daughters select Softball teams.
Mine has the Size 32 plate, They now make one larger.
I can buy plates and knives from Allied Kenco for it.
If mine quit today, I would be at Bass Pro in the morning to buy another one.