OK, I have 20,000 in alchemal bags so we're over halfway there...just want to check something on the old maths front...are you planning on having a stone first floor ceiling with a roof on top? If not, that's a saving of 11,424 blocks and with what you've already dug, we must be virtually there? I'll carry on a bit more but I think we should start building soon as these bags are getting heavy!!