If that day were to come, as a hacker, how do you turn down a chance to work with a well-funded customer that want you to build a evacuated tunnel train, but on

If that day were to come, as a hacker, how do you turn down a chance to work with a well-funded customer that want you to build a evacuated tunnel train, but on the other hand, this is essentially blood money. A passion vs moral dilemma...