I like both Shader and Sacrifice's ideas, but more partial to Shader's. The idea of attunable, non-consumable bundles of arrows is very appealing. The constantly recurring costs of purchasing 3000 arrows a day has never sat well with me (and yes I have Adept 3 Summon arrows, but it's not enough). I could palate it up until recently (Live Update 20) when I could no longer get by with my tin arrows.
I believe the ability to purchase and use a bundle of arrows, just like you would a melee weapon, or any piece of gear is a fair approach. I know this is a game, so realism can only go so far, but when you think about it, why don't tanks have to repair their gear more often (not talking repairs from death), the mob is beating on them all day and they incur the same repair costs as everybody else? Mages don't have spell components, why not? Additionally, melee fighters should have to carry whet stones, to continually sharpen their weapon after each fight. It just doesn't make sence to have these extra unnecessary burdens, so why should consumable arrows be any different?
Woodworkers don't craft Arrows in anywhere near the scale that would be required to keep the Ranger Community in stock, much less every other class that needs them as well. I think this would change, if they had craftable bundles, that people would buy one time (per tier of course). Make common and rare bundle types, as well as Crushing, Slashing, Piercing. This is less an issue since outright Immunities were removed, but still a viable option, that many, if not all rangers would buy all 3.