If you are talking about acoustic guitars I doubt that you would actually need over six total unless you are a collector. Some of these may need upgrading as money becomes available. Dreadnought ~ when you are playing with a group and need a lot of sound. Classical ~ easy playing ~ nice wide fingerboard

Parlor ~ Small ~ some with great sound ~ good take along guitar

Blues Guitar ~ You just need one of these

12 String ~ some songs just require a 12 string to sound right

Knockabout ~ If you need a guitar for canoeing etc. (my knockabout needs replacing due to fire damage)

Cap't Bob