I assume you are doing extract. If that is the case I would recommend having 4 or 5 fermenters and lots of bottles so you can get a really good pipeling going. Extract is not that equipment intensive so I would focus on anything that will help you make more beer. If the turkey fryer is big enough to allow you to do full boils then you are good there, but if not definitely get yourself a 10 - 20 gallon kettle with a ball valve so you can do full boils.
If you are going all grain then God help you. You will still need the extra fermentors but definitely a 15 to 20 gallon ss kettle with a ball valve. Get a good 10 gallon plus mash tun. I prefer a cooler. I use a 60 quart Coleman Extreme and I love it. You will want really good calibrated thermometer for the mash tun. You will need a 50 ft copper wort chiller and I can go on and on. Oh by the way if you are going all grain a couple of hundred aint going to do it. But you can build it a little at a time.
Welcome to the obsession!
This might be the beer talking....but I really love beer!