I have only been BIAB for less than 6 months and before I commited I did the sums. My ball park calcs were similar to Engibeer. I came up with my cost of ingredients only, at about $2 a litre. This did not include consumables, LPG, CO2, water, cleaning chemicals whatever. My previous beer tastes were also a bit higher as I tended to buy 4 packs and 6 packs of craft beer on whim. I justified it as research. I have spent less than $1000 on brewing gear, fridge, freezer, kegs and two CO2 bottles to date. Most gear was new, some I picked up second hand and some bits I already had. I will definately break even in less than 12 months. The main reason I decided to jump in and invest in gear was the price war going on late last year and still continuing with no end in sight. I did not like the idea of bottling and would not have gone to kegging at the old inflated previous.