You might have to monitor and switch to mining sha alts at some point which while lower cost can also be lower difficulty.  There are many choices out there for them but when and which to switch to all depends on value relative to bitcoin and the difference in difficulty.  There are a couple alts which are not setup for merge mining and they may be a good harbor for when BTC and BTC+Merged alts are no longer profitable vs. electricity costs.

Lastly, remember breaking even and even operating at a slight fiat negative may not be such a bad bargain, those who did before the meteoric price rise to $800+ are probably happy now and even if BTC did not rise so much they should feel happy they are helping to secure their investment in the system by keeping hash rate distributed between different pools, solo miners etc. which is a fundamentally necessary job whose fiat equivalent can cost much more money in the form of banking/investment fees etc. and with less direct control of how your investment is being secured.