It must be very dark and hot on the surface of Venus, but my humans want to change that and make a Venusian colony. The problem? The extremely thick atmosphere would make it problematic to say the least. There would be a contest between heat and atmospheric pressure to see who can do the colonists in first. The colonists solution? Send atmospheric drainage ships into orbit around Venus and extend a giant robotic Proboscis into the Venusian atmosphere.
The gas from the atmosphere will be drained into massive "Drainage Ships" that will be sent to Mars to add some of the atmosphere to it. The rest will be sent away, out of the Solar System. Since Venus is in inner fringes of the habitable zone of our system we can now place a permanent colony on Venus.
Is this realistic? How could I make it more realistic?