You may want to search for threads here concerning quality of Ikea cabinets that you can review and share with your husband. Here is one that might interest you: [Bodbyn line[(https://www.houzz.com/discussions/grimsloev-foil-or-bodbyn-painted-ikea-kitchen-help-dsvw-vd~4747393).

I've heard the argument about plywood boxes, but I'm not convinced. I know a number of people, including contractor and architect friends, who have installed Ikea cabinets in their homes and are still happy years later. Also remember that Ikea typically has a 25 year warranty on their kitchen cabinets.