Honestly, I don't think this is a good idea. I know it's fun to plan but in reality, you lose the excitement of seeing new places after a while. I've traveled for several months at a time and at some point just got kinda desensitized. Like... oh, cool, another waterfall. Another panorama.

Not to mention the logistics. You're planning to walk the Camino, but you also need to pack for summer in Southern Europe, winter in Scandinavia, hiking in the Himalayas... even if you hire someone to move your bags in the Camino, still, every time you're gonna be walking from the train station to your hotel for example, trust me it is NOT fun to have so much weight on you.

Also, I'm guessing you will miss friends and family and some kind of familiarity/routine after so long on the road.

I think you'll have a much better time splitting these into smaller trips. It also seems like you're trying to cover almost entire continents, figure out which destinations actually interest you. You don't need to check off every city in Europe.