> Your 'sufficient' solution is orders of magnitude more difficult than the 'not necessary' solution.
Depends on the bug in question ... we don't have any details nor a bug report with details.
> a) Finding and employing a team of sufficiently skilled people for sufficient time to solve the problem - let's say financing ten person-years, for a rough order of magnitude..
No idea where you are getting this numbers from but if fixing it costs more then buying new hardware then sure go ahead and buy new hardware. To go back to the car analogy if fixing the car costs more then buying a new one I'd rather go and buy a new one.