I have to give credit for this recipe for a university friend of ours called Alun. It's quick, easy and cheap, even to make big 5-gallon batches. If you let it ferment out and bottle it properly it's very nice, but when we were students we just used to dip a jug into the bucket and filter it through a coffee filter as and when we needed it.
Alun's Tea Wine
For each 5 gallons -make 40 cups of strong tea, 12.5 lbs of sugar, 2.5lbs of raisins chopped, 2 lemons sliced. Make up to 5 gallons with boiled water. When cool, add wine yeast, following instructions on the packet.
On our recipe it says "ready in 4 weeks", but I think that's only for students. My dad used to say "Not a drop is sold 'til it's 7 days old". Nowadays I'd ferment it out, rack it twice and bottle it properly. But if you want to do it the "gut rot" way, be my guest.