Ok, so I drink a bottle a night on average and my wife drinks a bottle every couple of nights on average.
So thats's 365 for me and 183 for her which gives 548 bottles.
Now sometimes we have friends over so I guess that could be rounded up to 600 or even 700 bottles of 70cl.
According to this Google Search
Google it would take 600 - 800 grapes to make a bottle so lets take an average of 700.
700 grapes * by 650 bottles means I need about 455,000 grapes.
Tesco sell them in punnets for £2 which contain about 45 grapes so based on that I would spend over £20,000. This obviously isn't economically viable.
So how many grapes are on an average grape tree.. Would 455,000 grapes be on a single tree and could I harvest them and save a fortune?