Work with wood shop full of tools and no portable tool box, so ya build it! I do furniture repair and cut down a intertainment cabinet for a customer and brought the lumber home, ya don't throw it out, ya recycle it.
Hand cut dove tail box and a lot of planing on paper with your ideas ( cause you can fix them on paper before you make a mistake)
Some of the hardware was hard to find, so I ordered it. I made drawer slides with dove tails, very pricey to buy. False bottom above drawers and enough room for a sliding tray at the top. I might have $75. into it