I don't think I'd carry on for ten models, but here's what I've found:
Ruger .22s- a Mark I autopistol and a 10/22 rifle.
For a centerfire pistol, a (heaven help me) Taurus 92. 9mm is the cheapest centerfire to shoot if you can get to Wal-Mart. My stupid, cheap 92 is rugged and super-reliable. I use it to chew up second-rate ammo, but it won't break or choke anyway. Dangdest thing.
For a shotgun, a Mossberg 500 is a steal. Simple, cheap, versatile, won't break. Barrels are cheap, too, so you can have a bunch of different guns if you need them. Plus, it can be taken down far enough (if you dismount the buttstock and magazine) to fit inside a motorcycle saddlebag.
For a centerfire rifle, well, a Lee-Enfield No. 4. For a hundred thirty bucks, a barrel of laughs. You might do with an Ishapore model in 7.62 NATO, for a few bucks more. I've never had more fun with a rifle, and you can actually shoot the thing kinda fast if you try.
Bill