Wtih the first factory it takes 4 constructors to build up your Econ starbase, at ~150bc apiece. That's 600bc, +432bc the game charges you up front, for a total of 1000bc initial investment. Unless you're evil, then you can ignore the 432bc.
I just played a game on Crippling and got the pants out-colonized off of me. It was worth it then--the game was long. The AI's researched all the factory techs except Industrial Sector, which I traded for, and by the end of the game the econ starbase was kicking butt. But that's the problem: it was the end of the game. Doesn't do much good then.
I'd say there's 3 factors that make the Econ starbases more useful: length of game, level of factory tech (that's a big one), and number+quality of planets you can enshroud (you can throw more factories on higher-PQ planets). Before you get that second factory tech, it's just not worth it; and there needs to be enough game left after that second factory tech to get a benefit from it. Sure, you can build it earlier and make the bonus last longer, but there's the opportunity cost. You can spend your bc on Social production instead and build Galactic Achievements first, and build factories on your other planets while you're at it. Get some raw production points out first. You can later multiply it by a Econ starbase %, if the game's long enough.
I really like the bang for your buck you get with Military starbases, though; especially in the early game. You can calculate their value in terms of extra ships you didn't have to build, and most of all, DEAD ships you don't have to replace. And then you can "upgrade" your obsolete ships simply by upgrading your military starbase another tech level. Don't forget to put one point of defense on your ships to use it.
I just played a game on Crippling and got the pants out-colonized off of me. It was worth it then--the game was long. The AI's researched all the factory techs except Industrial Sector, which I traded for, and by the end of the game the econ starbase was kicking butt. But that's the problem: it was the end of the game. Doesn't do much good then.
I'd say there's 3 factors that make the Econ starbases more useful: length of game, level of factory tech (that's a big one), and number+quality of planets you can enshroud (you can throw more factories on higher-PQ planets). Before you get that second factory tech, it's just not worth it; and there needs to be enough game left after that second factory tech to get a benefit from it. Sure, you can build it earlier and make the bonus last longer, but there's the opportunity cost. You can spend your bc on Social production instead and build Galactic Achievements first, and build factories on your other planets while you're at it. Get some raw production points out first. You can later multiply it by a Econ starbase %, if the game's long enough.
I really like the bang for your buck you get with Military starbases, though; especially in the early game. You can calculate their value in terms of extra ships you didn't have to build, and most of all, DEAD ships you don't have to replace. And then you can "upgrade" your obsolete ships simply by upgrading your military starbase another tech level. Don't forget to put one point of defense on your ships to use it.
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