I think representing the tonnage in 'k' would be compact enough to fit into the display window. Factory = 25k, Terraformer = 125k, and so on - much more compact than writing out all the zeroes.
Speaking of Terraformers, while we're changing things can we balance the cost of the installation and the ship module? The ship module is cheaper and otherwise superior in almost every way, really could stand to be tweaked slightly.