TODO - Building Rentals

Rather than renting out a land plot which comes with various problems (if renter pays for building construction/upgrade/maintenance and then owner cancels, etc), we envision players being able to rent out the use of their buildings. So the owner manages the building, but can rent out its production capacity, so the renter would supply the workers, food, DEC, input resources, and would gain the output resources with an agreed percentage of output or DEC cost going to the owner.