I'm a noob to this series (I only played and finished Ace Combat X on PSP) and I noticed that on AC5 you can't have all aircraft in one "run". This is different from ACX where you could play the same mission over and over to get the money.
Now this is not a problem for me but I'd like to avoid finishing mission #28 (a random number) only to realize that I don't have enough money to buy a decent aircraft to complete mission #29.
What aircraft are a must have in this game? Which aircraft should I buy in order to finish the game without many problems? I like challenges but using lame aircraft before knowing it's lame on the first "run" is not good!