Units - Cheap Workboats
Compatibility: Hot Seat, Affects Saved Games
One Worker (cost 70 hammers) can build/repair an unlimited number of improvements, but one Work Boat (cost 50 hammers) can build/repair only one.
Rather than attempting to permit Work Boats to build/repair a (limited) number of improvements (3 or 4) before they are "consumed" (which would require significan Lua coding) the same effect can be achieved by simply reducing their cost.