[Suicide Junkie]

When setting up a scenario, you should use a temporary mod, which makes the base maintenance zero, makes SYs build at 100000 rate, and resource facilities produce 100k each.

This will let you get things built fast, and you can make all the engines provide 30 movement points so that they get to where they're going fast.

Von Neumann BaseSYs in orbit of the homeworld can make it easy to build tons of ships while taking only a handful of turns to do.

Once its all set up, change the mod back to normal and process a turn to get things nomalized.