Perhaps these figures can help you.
The latest French Aircraft carrier "Charles de Gaulle" cost $3,300,000,000. In comparrisson a new A-10 costs about $10,000,000 a Harrier AV-8B costs about $24,000,000 a F/A-18 Super Hornet costs about $35,000,000 and a B-2 Spirit (stealth bomber) costs about $750,000,000. I think these numbers should be relative to the costs of there fictional counterparts in space. Which would explain the lack of cloacked fighters aboard the Midway, because they just cost to damm much.
This would mean that with a fleet consisting of a aircraft carrier, a cruiser, several destroyers and lot of transports and about 600 fighters and bombers. Those 600 bombers and fighters would cost about half of the total fleet cost. Dividing 5 billion by 600 would come to aprox. 8 million.
If the fleet would contain a bunch of cloacked fighters ofcourse the costs could become a lot higher.