Welcome to Shop Talk.
I think pretty much everyone who gets the knife bug wants to become a profitable knifemaker. That is a goal, but the path is learning to make knives.
Get whatever equipment you need and can afford. Practice regularly, making each knife better than the last. After a period of time the knives will start to become what people will buy. That is when you consider selling knives. For some people this happens in 6 months, for others six years. There is no formula for determining how you will progress.
As far as a grinder,
There is a great thread in the Stickys about grinders. I personally recommend the Reeder Basic package and a VFD motor package. You will end up with a first-class grinder for just about what you are planning on spending. However, knifemaking equipment is a bottomless pit or expenses. You will need wheels, belts, files, special tools, steel, wood, rivets, HT ovens, forges, tongs, hammers, more grinders, drill press, band saws, .....etc.
Recouping these costs at break even by selling is what many folks try to do. Few ever come close.
My advice is to keep the goal as a hobby that somewhat pays for itself. Enjoy yourself and just have fun making knives for now.
