Hi Robert,
How do you show your Custom fields in a table on a Page in frontend – Is there a MB plugin?
You probably need to use some code to output the custom fields. Please refer to the helper functions to do that. As you control the code, you can output it the way you want (in table or list, or plain HTML).
How would you go about showing all the Custom Fields – INCLUDING the related Custom Fields data?
If you use MB Relationships to create relationships between objects, you can get all the related items. And for each item, you can get custom fields using the helper functions as above.
Can you sort such a table on Field titles?
You might want to use a JS-solution such as DataTables.
How can you make a search for a Cat and show all Custom Fields and Related Custom Fields?
Please try FacetWP. We also have a free integrator with it.