I like this, I would also like to add, a way which we could use our idle builder to help people who belong to our fellowship.
It would be great to be able to go to a member of my fellowship and either build or assist in upgrading a building using my supplies or a portion of the supplies needed to build. So if 4 members chipped in, then the member and 4 helpers would split the cost and time to build 5 ways.