Need for what? I could argue that this is the "need" list:
12ga shotgun (for bird hunting, home defense, etc)
.308 bolt-action accurized rifle (long-range hunting, big game, etc)
9mm subcompact pistol (self-defense/home defense/CCW)
Notice no .22 firearms. While they cut ammo costs down for plinking, they do not get you used to handling the recoil, double-tapping, etc like you could with the caliber you will use. Thus are a luxury item. Now if it was a varmint gun, cool...but isn't that what the .308 can do?
Economy is also a luxury at times....talking about "need" means just what you need, nothing else. To me, that's a potent shotgun, a very accurate and decently powered rifle, and a good all around concealable handgun.