Hello Steven Harrap,
You can take a look at the Products catalog sample - it has a custom type - Product - that inherits from Content, it has its own provider and manager and the assembly that is built is enhanced through the OpenAccess enhancer. Also it creates around 7 tables, but this is handled by OpenAccess - all you need to do is define the persistent classes and apply the appropritate mappings.
You should find everything in the SDK sample.
All the best,
the Telerik team
Do you want to have your say in the Sitefinity development roadmap? Do you want to know when a feature you requested is added or when a bug fixed? Explore the Telerik Public Issue Tracking
system and vote to affect the priority of the items