You can't do this kind of work motivated by money. You have to love the idea.
That's so much better...
Or, here's a crazy idea: You could hire two passionate people and allow them to each live a normal, balanced life, thus preventing burnout and reducing the chance of mistakes while increasing overall productivity (since studies show that one person working twice as long is not twice as productive).
Wild idea, right?
I don't care how much I love the work, I get paid the value of my labor or I walk. If that means $800,000 year for 80 hours a week, that's what it takes. There are very few cases I would ever take less compensation then I think my time is worth, even for a job I would love. To me, its a matter of self-respect.