>>63961118 (OP)>Which is more fun>Muskets and rifles or cap and ball revolvers?Are you excited by the prospect of autistically swabbing every nook and cranny of a revolver and then re-oiling her each time you put even a single round through her? If so, get a revolver. You can brick one in a week or two if it's wet out, long guns require a lot less work to keep going. Yes, I wrecked my first revolver, how did you guess?
>maintenanceRifles, muskets, and fowling pieces are the easiest to clean and keep running. I'd argue a SxS shotgun is probably the most fun because you can use wads to put retarded shit into it or just shoot clays with a smoke generator, but BP rifle precision shooting is also great. Muskets are the budget choice, and you can still get decent results with the right slugs. You can also use larger-bore muskets as fowling pieces, it's not like people didn't back in the day.
>lock-workPercussion locks are the cheapest to buy, most and easiest to maintain, flintlocks are mostly an aesthetic choice. The best source for flintlocks are those Indian "totally not a real gun" kits where you have to drill your own touch-hole, or well-maintained vintage guns. You can also pull a working flintlock from a trashed vintage gun and pop it onto a modern kit gun, but you'll still probably have to replace the mainspring at some point. If you're making your own gun, then a matchlock or an electric match is the easiest.
Also, be careful with vintage shotguns. Century-old Damascus barrels are a complete crap-shoot. Not least because they hide crippling cracks and rust extremely well. You might get lucky and have a good one, or it might frag the barrel after ten shots.