Just ordered a keggle (15 gal) from one of the vendors here for $100. Don't think I'll ever outgrow that one!
This should be enough right?http://www.ebay.com.au/itm/Aluminium...item56491b1bf2
I'd go with a 20 gallon if I were you and get 10 gallon batches out of the work. I was doing 5 gallon batches and for the amount of money and time it's a way better deal for all grain, which is pretty much what biab is.
Woah, you don't need a basket. My hand sewn bag held up just fine. That sams pot I mentioned was only 45 bucks with a lid. 40 qts.
What's your boil-off rate like?