Nope, because I'm going to colonize 7 or 8 planets in the first 20 minutes of the game. That technology will be needed. Odds are in your favor.
If you colonize planets that fast, you will leave yourself with a huge underdevelopement penalty. And the bigger the penalty, the longer it will take for you to make the cash required to improve the planet.
I'd love to see a replay where you put your tactic to use against a human opponent.
Nope, because you simply cash in the metal that you are producing to raise the cash to upgrade the planets.
The more metal you sell, the lower the profit for you will go as well.
And it actually puts even more pressure on your economy having to build all the metal extractors. They are some 250 money a pop, and if I'm generous and say you've got a standard income of 10/s, you can only build a new every 25 seconds. And since there is average 2-3 of them to build for each colony, you will have to spend, 6.25 minutes on building just them if you've got some 6 colonies. That's time where you won't be able to spend money on anything else.
Odds are the enemy will not find you soon enough to do much damage. Besides, after the six frigates I am researching Capital Ship crews and building a hoard of capital ships.
Odds are the enemy will find you and have you under attack within the first 3 minutes of the game. That's what I've experienced in the past few multiplayer games.