Don't worry, mining is going to be your smallest problem. As soon as somebody put together even 1k qbit unit traditional cryptography as we all know it is dead - and so does the world as we know it. Think about it: Internet commerce is gone, secure communication is gone, financial system is back on dedicated dial-up lines. You can't pay with a credit card anymore, you can't trade unless you're physically on the Wall St. Welcome back to the 70s, man.