Guild Wars 2

Sorry if this sounds silly… But I am a bit confused about making a Guild bank.. I looked at the wiki but didn’t get it clear…. Do I need more then one upgrade to the Architecture Level????

Architecture lvl 2 makes it possible to build the Guild stash (50 slots). Level 4 makes it possible to add the Guild treasure trove (100 slots) and level 5 makes it possible to add the Deep Cave (100 slots).
Total influence cost architecture lvl 1-5 + the 3 vaults: 52 500 influence.

Okay thank you that makes it more clear… We are just starting out here My r/l Girl Friend and I are the guild so far….