These are 6 or 7" cabinets.... shallow but useful storage for lots of items. The cabinet over the slider is really small, but the others are used for electronics stuff, clothes, kitchen items. etc. The cabinets behind the sliding doors are an inch wider for towels, bathroom stuff, first aid, etc.
They were my solution for storage and to cover the hard-to-cover corners. No heads banged yet!
You can see the depth here.... with your walls done, adding cabinets would be easy
ps. I like the look of the wood you used!