Some1 has already mentioned Welches wine, but you want even cheaper? You don't have to go with Welches, go with generic. $1.19 instead of 1.99/can. Add onto a yeast cake, add 4lbs sugar. $15 for a 12% wine, 5 gallons. A BIG bang for the buck
Mt.Dew wine, or any soda will do. get a couple 3 liters of cheap soda and some dry yeast, and you will get about a 7% wine, add sugar for more abv. you can even ferment it in the soda bottles so you don't have to use up a fermenter.
Haha what does water, sugar, and yeast even taste like has anyone tried that?