Congrats on retiring soon.
I have the Go Big also and love it. Invest in the cubes for simple storage of the dies. For single dies, I add a label on the side with number, shape and finished size.
Get creative with storage for your stash. Don't forget under the bed storage too. Think about buying the cutter system now and use up some of the stash. Make some kits out of your favorite fabrics to use when you downsize.