My first grinder was a Grizzly. It is a pretty good grinder for the price. You still have to get some plywood to make the base and do some assembly. I was using it for general grinding, not knife work. It may work ok for you now but you will sooner or later want more power and flexability.
My suggestion is to get a copy of Tracy's plans, Order your parts from him and build your own. See if there is anyone down in south Texas who has built one so that you can see it. I would never have tried building a grinder if I had not seen Stephen Fowler's. Once I started building mine I was amazed how simple it was. I made a number of changes on mine, which I think are improvments. Didn't I send you a copy of my Build a Belt Grinder brochure. If not it is in my first post on KD. Look at it and get some ideas. You can build a grinder from the plans for close to what you can get a Grizzley for and have a much more versitile, useful machine....assuming you can get your materials a scrap or drops.