Hi Tue, 

Price for hosting always depends on what you would like, and what you would need to use.

One example authoring package is hosting for £30 a month which includes free updates every two weeks, with 15GB space and 1TB transfer, but this may be too much depending on how much you are going to be using the tool. 

It would be great to hear more about your requirements. Please email me at wesley.atkinson@appitierre.com

Thanks

Wes