Originally Posted by MikeRoth

~800Ghash/s if I mathed correctly... a 50Ghash ASIC miner runs $2,500

So you would need 16 of those ASIC rigs costing you $40,000.

Also expect the difficulty to rapidly increase over a couple weeks/months. So you may start out at 50 bitcoins day at the beginning of the month and end up at 30 bitcoins by the end of the month.

FYI: That same hash power if you mined litecoins instead and exchanged them for bitcoins would be 67 bitcoins a day.

I feel like my math might be wrong somewhere... feel free to verify