In Star Trek: First Contact, warp drive inventor Zefram Cochrane explains to Riker,
You wanna know what my vision is? Dollar signs — money! I didn't build this ship to usher in a new era for humanity. You think I wanna see the stars? I don't even like to fly! I take trains!
How exactly was he planning to make money off of his warp drive invention? Was he planning to provide a service? If so, what was this service supposed to be and who would benefit? (If the service were travel, then who would be travelling and to where? If the service were cargo, then what and from where to where?) If he was planning to sell off the invention to a buyer, who in the shattered post-World-War-III economy would have bought it and why? A surviving corporation? A military faction?
If the end goal were money, it seems unlikely that someone would attempt a project of such magnitude and complexity without having a definite idea about how to translate the outcome into profit.
(I am especially looking for canon / extended universe information.)