You could create a document "products" or so. The "Rasenwalze", "Einrollen-Vibrationswalze" and so on will become single documents and saved as children of "products". You can list the content of the childrens with the Ditto-Snippet in your products-document or its template.
To implement an image use TinyMCE or an Image Template Variable.
I guess this could be a solution. But when I think further, I would have to give the client the possibility to create and delete documents, which I think is not a really bulletproof solution. I would rather like to have them only insert content without editing in the document tree.
thanks a lot