A whole lot depends on how serious you are about staying with it long term. I started with a 2X72 from Grizzly. I still have it and use it for somethings but my primary is a 2X72 3 hp. variable speed with both a flat platten and a 10" contact wheel setup. Good variable speed grinders aren't cheap but they are worth the money if you plan to stay with it for a long time. Some start with just a 1X32 from harbor freight and some even start with just using hand files.
What type of power tools do you currently have?
Thank you for your response Mike. I have been in the construction and commercial building
Maintenance business for 40 + years. I own at least one of most power tools and hand tools.
The grinder appears to be the first piece of equipment I need to purchase and
while I certainly donít need to start with the best out there, I do want to
purchase a very good one, and I want to purchase the right one based on
others experience in the knife making profession.