home brew - would this work???

[Franc]

how much (as a rough rule of thumb,) lossage is there in fermenting, ie if you start with 10 litres of juice do you get about 10 litres of alcohol, or do you loose a bit of it evaporating? and does it cost pennies per litre, (after the first few batches and after buying all the equipment). mainly cos cider is cheap from supermarkets at the moment.