For those of you that have your own grinders, do you have any words of advice to some of the rest of us who have been thinking about starting to grind our own?

I know I could easily make hamburger, but how hard is it to make decent sausage? Do you buy pork or beef fat to add to the deer meat? At $50 for 24lbs of sausage I could justify a $200 grinder if it wasn't a ton of work to make sausage. I would expect to be processing a couple deer per year and 2 or 3 pigs each year for many years to come so if it is something that is doable then I should probably start doing my own.

My only experience is with a hand grinder growing up as a kid and not adding any beef or pork fat to it and we ended up with a very big mess that didn't taste very good.