You dont need a kit, just choose your favorite fruit and look at some of the recipes out their, see what yeast they use and get it from local brew store. Food grade buckets are cheap at hardware store $5/5gall here at Homedepot. As long as you are clean and its in a clean space you dont need to worry much.
Plum is a nice base with Rhubarb and Strawberry for my taste, so you need to mix and match as is and give it a taste to see what you like, again look at other recipes to see quantities.
Yup lots of Raspberry Pi school projects out their for Plants and hydroponics. Check out Add A Fruit website and the Raspberry forums/projects. Ive done time laps with the Pi, nice to see the growth speed.