Yeah, its never made sense to me why:
SPAA costs 70
Heli with only AA costs 200-250
Fixed wing with guns and/or Fox 1/2 costs 500-550
Fixed with with Fox-3 costs 700.
Its actually kinda insane the cost for CAP.
Id dramatically drop the base spawn cost for fixed wing down to at least the same as a heli, around 200. Then just increase the cost of the loadout options to compensate, but I would dramatically drop, if not outright remove the cost for A2A weapons. Id maybe even remove the SP cost for ammo belts past a certain point, like 11.0. Because if you are getting gunstrafe kills at that BR, then I think you’ve earnt it tbh.
Just needs a block on first spawn, and sorted. CAP becomes waaaaay more viable for countering CAS, because at the moment, its just not economically viable to spawn in a CAP most of the time.
Then on a case by case basis / BR to BR, increase the cost for certain gun types / ammo belts so that gunstrafing at lower BRs is balanced too, or at a bare minimum, just have the base SP Cost drop around 10.0 (where guided CAS starts to really become prominent)