My mod idea builds entirely off of the already established Cloud-like storage systems mod(s), however, I don't like the idea of chests. This mod would seek to bring NPC's to the game that can be interacted with and used as a Skyrim wide storage network. It is my vision that you would need to pay for these services, perhaps paying more for upgrades in space etc. The NPCs would ideally be placed in an inn in each town/city, possibly with support for popular mods that add new places. I am sure this would not be a particularly hard mod to create, except for the mod support, and thank you for taking the time to read this request. Also if this already exists, I would be thankful for a nudge in the right direction.
