I went that route for a while but I HATED grinding meats. It took 1 to 1.5 hours to do and made a big mess. I bought a manual grinder and then a new electric grinder from Northern Tool for about $120 with tax. I wish I had never bought it at all. I sold it after using it for about 2 months and lost some money on it.
If you do it right, it seems to me that you ought to be able to get them on raw meat without grinding it. Just get a meat cleaver and a good cutting board. I don't think it's written in stone that cats have to transition to ground meat before meat chunks. I didn't feed Cubby ground meat. He went right from canned & dry to meat chunks, but it took a while to do.
If you really want to grind I'd get a Northern Tool Grinder. They're sold on amazon.com - unless you have a local NT store.