Do you think the north and south American Indians the Aboriginal tribes of Tasmania and Queensland think the cost of shipbuilding in 15th century Europe was miniscule?It's like being around in 15th century Spain and discussing the merits of ship building.
Humans have always explored and pushed outward. It is why we are on every part of the planet and it will be why we will eventually move off this rock too. The cost is miniscule. Tiny. Utterly insignificant in the grand scheme of things. As soon as there is money to be made it will grow exponentially