We can provide solutions in both, what we don't like doing is suggesting proprietary software that limits an organisation's ability to be flexible with its data and not lock its users into a user high pay scenario for future changes and management of sites.
As an organisation grows its website gets easier and easier as people become more familiar with it,
Over time the collaboration and the content management get easier as the staff become familiar with the processes.
As the organisation grows there is more content for the website and social media channels to choose from which makes the content management easier.
what is a more powerful feature is your sites ability to move quickly in a rapidly developing environment. This is where open source leads the way, if its hot tomorrow Open Source CMS's are generally there first