The first post lists the costs for each category.  Gaining a second fleet costs 20 power, and would give the military a second fleet with 4d6 in each category.  The reason there is opposition to this is that would leave them with only 10 power (plus bonus d6s), which doesn't buy much fighter support.  There has been some discussion about allowing your character his sub-fleet on the condition that a portion of your fleet's power be given to them.  I think this is a good idea, personally, and gives everyone what they need for their character concept as well as an interesting command structure (with plot hooks) and good resources.