Dick, I have been where you are, and trying to get offa my Azz to build my cabinets, and storage areas, plus make a variety of flat places to work on, and lay stuff in all degrees of doneness.
It is a ton of work, and more than once I have considered buying the storage.
Then I flash back to the huge pile of plywood laying on 2x4's on my shop floor that are suppose to be becoming cabinets. Not sure what else I would use it all as?
Good on you for getting yours going, looks good.