Hi Brian.My name is John and I am a homebrewer:>!I grew hops for a couple of seasons and just how much do you brew?
Two hops vines will keep you in all the flavor and aroma hops you can use by the third season.I can see getting different varieties,but more than one of each is overkill.BTW using homegrown hops for bittering is very dicey,since alpha acids can vary greatly from season to season.If you do want to propagate you can just cut a piece of rhizome after a couple of seasons.Hops are downright invasive,so keep 'em in check!Good luck and happy brewing!