Renovation Frustration - Storage Needed!

I have this space in my dining room, most homes built in the 80's and 90's do, I want to convert the spot for a buffet into storage space. The issue - my tight budget... I have no money, being unemployed kinda has that effect on a wallet. It's frustrating because the cost of built ins is so high, I'm probably looking at a couple thousand dollars just for the supplies.

The other frustrating part is figuring out what I want in this space. Do I want it to be complete storage or do I want countertop space or should it be bookshelves with doors? Are there bookcases that are 2 feet deep? Can I get away with white MDF or should I look for paintable shelving or prestained? Does MDF come in espresso or black brown?

I guess I'll have to go hang out at Home Depot or Rona to figure it out, another day shot.

Once its done it'll be great because I can start unpacking all my crafts and books but until then it's frustrating to live with an idea that I won't see finished for a long time. I've never been the most patient of people.