Here is a quick cheat sheet for ASIC miner and 6 GPU rig earnings. The cost was figured from the current selling prices on ebay. The profit after one year is figured by whats left over after mining for one year and paying off the machine. The year percent return is found by the percentage of profit vs the initial cost. This assumes the difficulty doesn't change and the value of the coin mined doesn't change. Over the past few years, the value of the coin has risen faster than the difficulty, so you should end up with at least or more than the figures shown below. All the hash rates and revenue per month are directly from the current nicehash figures. If you use miner pools you should be able to get even better results.
