Kudos to you, it makes a big difference and is not a small project. I've been doing the same thing in my shop this summer- since I can't get parts and projects are mostly in a holding pattern, it seemed like it was time to tackle it. I could barely get to the beer fridge. People ask why I let it get so bad to begin with; but with ongoing house renovations and other jobs, the shop seems to just turn into a staging and storage area. Feels good to not be climbing over piles of crap to get to everything, doesn't it?
Not only was the building filthy dirty when we moved in we had put a lot of the stuff that had to go in the house in it. Only down to a few boxes in the house to go through through now.
As I was trying to figure out where I was going to put everything I thought that I may need to make the building larger. Now that I can move around in it I still want it larger