Why can't we have Guild owned assets

It would be good if the game allowed guild owned assets that could be used by any members of a guild.
For example a guild could spend, their time upgrading several galleons that could be used by any members of the guild, rather than the current system where everyone upgrades their own and if that person cannot make it to an event it cannot be used.

There would have to be some restrictions on such a system so people would not abuse it, but I think it would be a good system for items like galleons, trade ships, siege tanks etc.