Shop upgrades.

The cost of having the foam done has come down drastically in the past few years- the cost of buying to do it yourself foam packs, the time it's going to take you to do it (pros can knock out your shop in a couple of hours), and the fact that 1/3 of your foam may be wasted from you "learning to do it" (overapplying and having to trim off all the excess, not getting the adhesion right and having panels fall out before they set, etc.) starts to make farming it out more attractive.
But either way, make sure you have all your power runs and other utilities in the wall before you start foaming- it's no treat to snake new Romex through the walls after the fact. If in doubt, install some conduit runs so you can wire it up later.
Enjoy- you won't believe what a difference it will make... winter is coming!