I just purchased my first bow.....a 1991 Martin Cougar Speed Flite.

What's the rule of thumb for time frames on changing bowstrings? Annually? Bi-annually?

Waxing bowstrings..... The majority of my bowstring looks to be protected by a sheath, should the sheath be removed in order to wax the entire string?

What's a "reasonable" cost for an archery shop to change out a bow string? And do (or can/should) the archery shops place your kisser buttons, nock points, peep sight, and silencers and other accessories on the new string?