I have a cheap easy to use knife sharpener. His business is about 6 blocks from where I live and he provides a great edge on my hunting knives.

He charges my $4.00 per knife to sharpen. He is a professional knife maker and sharpens knives for a few extra bucks.

I bought a Spyderco Bill Moran model hunting knife it has very hard steel and a very sharp blade (vg42 I believe, there are several other steels as hard or harder available). This purchase solved my knife sharpening headache. Can't remember exactly what it cost but it was under $100.

I have cleaned two elk and a deer with it (without any sharpening of the blade at all) and I think it is finally ready to be sharpened. It is still pretty sharp but it is ready for a touch up.

I wanted a knife that would never need to be sharpened in the field so this knife works great for me cause I have a proven/demonstrated inability to sharpen a knife.

My advice for what it is worth is instead of spending the money on a sharpening system spend it to get a knife with a very hard blade that will hold its edge and not need sharpening in the field and then find a professional to touch it up for a couple bucks when it needs it. If you are a one deer a year guy it could be 5 or 6 years before you need to have it sharpened.