700 th/s will get you about 1.25 btc a year. That at say 13 th/s a miner asic, at a cost of $800 per asic works out to ~$44k upfront and then each asic burns at

700 th/s will get you about 1.25 btc a year. That at say 13 th/s a miner asic, at a cost of $800 per asic works out to ~$44k upfront and then each asic burns at least 1k/hour for about another $37k if you get power at 7 cents/kw. Then add cooling and data.