Each bathhouse cost the original price of the whole park system
Evidence
The architects hastened to explain to him that Ohio sandstone and Barbizon brick were simply not used on public buildings. They were among the most expensive of all facing materials. Why, by using them on structures as large and elaborate as those he had in mind, each bathhouse would cost alone what Moses had originally said would be the cost of the entire Long Island park system: a million dollars. — Robert A. Caro, The Power Broker, 983