csv import

I have an eCommerce Drupal website with a large amount of products listed. One of my suppliers has 18,000 items and I get sent an updated file every day with updated pricing, stock quantities, new items and of course items that are no longer available are simply removed in the updated CSV file etc.

From this csv file I have to manually allocate items to categories that have been created on my website and therefore my pricing csv import file differs from the original file.

I was looking for D8 code to create Nodes from a cvs file. I understand that this would normally be the work of a feeds module. But as D8 is kind of new, and I have this requirement anyway, I wanted to create a module that will create a couple of custom node/content types.. then populate the nodes with about 30 records from a cvs file.
My use case is that this would be a way to create a site with just modules, including real data. Then feeds could take over afterwards.
I also want to create the Views for these content types.