I think if I bought a pistol caliber carbine other than my .357 lever gun or other magnum handgun caliber, talking auto caliber, it'd be a Hi Point. The reason is I'd really have no use for such a weapon. Small game? I ain't got no shortage of .22s in my safe. I don't need it for self defense, have pistols for that. The high point would just be a fun gun.
9mm ammo has gone up a little. At the current price, near 9 bucks at wallyworld, I've broken out the old Dillon Square Deal again and started crankin' out my own. .22 are cheaper and more accurate in better rifles for small game. Don't need no 9mm for that, but that's just me.
The Kel Tec sounds like an interesting gun. I like how it folds down for transport, not sure if it'd fit in my bike's saddle bags, but looks like it could. I think I'd want the .223 version, though. I don't have anything in .223 currently, or any .22 centerfire. That's a hole I've never filled because I really don't have a hunting use for a centerfire .22, but it'd be cool to have one just because, kinda like the 9mm carbine.
I've fired a Cobray select fire sub gun. Heck of a squirrel gun, that one, ROFLMAO! However, I bet that Kel Tec is pretty accurate. That'd be the one you should take a serious look at. Don't know, might find a used Marlin camp carbine around for cheap.