After everything that is possible to terraform we will need to create a trading goods organization that will send food and other supplies to Planets or moons that need supplies that they could live off of.This might not be permanent because some moons or planets could create a more complex variety of foods environment protections even a natural made ecosystem.
Natural Made ecosystems could have been available Life could have started 3.6 Billion years ago.3.6 Billion years from know,new life would have developed into a intelligent species.If this life is as intelligent as humans than it would give this species of humans enough time for them to get out of the solar system before the sun explodes.If this new ecosystem of species on all planet and moons than life would exist in high numbers instead of low or few numbers.We could also multiply the number of objects that could be own by species from different objects.