Hi there,
I'd like to put myself forward for consideration of your project of on-going work on the existing CMS your client has. I've been working with ColdFusion since around 2005 - I also led the open source effort to create a development environment for CF - CFEclipse [login to view URL]
I have availability as-and-when required and while I would liaise with you to work around any upcoming availability issues that might arise, for the foreseeable future I believe I would have no issues with your on-call requirement. I'm also based in Switzerland, so there's no considerable time difference.
I am familiar with Railo, if you excuse some name-dropping, I worked with Mark Drew, CEO of Railo in the UK and also speak weekly with Gert Franz, the main head of Railo here in Switzerland.
Finally, as I grew to understand your client's CMS I would probable look to propose to you (and therefore for you to your client) to add functionality for them to add pages by themselves. Having a developer seems a terrible waste of time and money!
I look forwards to hearing from you to take this forwards.
Regards,
Oliver Tupman