change website from html to php

I would like to have some more details please. Things I am looking for are: 1) Change of whole website from static hmtl to (free) cms or portal system in 3 languages 2) good search function for accommodation 3) possibility of accommodation owners to log in with username and password (to change rates, any information etc.) 4) modules or something similar to fit in rest of: [login to view URL] and other 2 languages I have some forms which might need to be shown under ssl Other suggestions welcome. Thanks Georg