Does the crane defray the total cost of building a building, or only reduce the cost for the land space. The crane reduces each building space by 3 pounds. The first space is always 0, the second is 1, third is 2 ect...
For example , I buy a £3 building for my second building. Is the total cost for me £3 or is it £1?
With the crane, the first 4 spots would be free to build into, but the 5th space would cost you 1 pound, as it would normally cost 4 pounds, but the crane gives you a 3 pound discount. The 6th spot would be 2 pounds with the crane, 5 (normal cost) minus 3 (crane discount).
You still pay the full cost of the building itself, and any extra for the remaining meeples adjacent to it at the time of purchase.
I hope that helps.