Looks like I'll be going full-time.

Your life will be hectic until about late July when you slow down and take your first breath. If you can avoid a storage unit do so, if not don't stress about it. Put the stuff in there in such a way that you can access the back pretty easily. In 6 months or a year go back to it and decide what you don't want to pay to keep anymore. Your opinions will be very different at that time now that you have settled in to your new life with a lot less stuff. You will realize that you don't need all the stuff you had in the past and which you may still have stored.

Good luck with the sale and I hope it goes thru for you.