I wonder whether the inventor would have better luck shipping his cranes to another state where the regulatory barriers would not be so steep. Lots of mid/high-rise buildings going up in places that are not NYC...
If your crane can be deemed a part of the structure itself, you save millions in insurance costs.
Insurance costs for tower cranes are insane in NYC due to the risks - there were big payouts after a few collapses which killed people. As there are not that many tower cranes in NYC to begin with, this risk pool is not very large.