A pistol for close work
.22 bolt action for hunting small critters
.30 rifle for hunting big critters
.223 cal or 7.62mm with large capacity mags for keeping critters off the block
12 gauge shot gun for keeping critters off the porch.
Buy ammo every chance you get - I do cash at gun shows.
We have a variety of weapons with versatility and power for about any conceivable situation but I like to carry “light” for convenience. Couple .22 rifles, a Rossi carbine lever action chambered for 38 special and .357, 12 gauge and a variety of pistols/revolvers. I stocked up when .22 LR was becoming scarce/expensive and probably have more rounds than I’ll ever need, but what the hey.