Costing Data for Class A Office Building in Long Island, NY

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Hi guys, I am trying to figure out some costing data for development of an office building (class A) in Long Island, NY. I am going to research the web and eventually talk to relevant professionals in the area, but I wanted to also pick the brains of the BP community as well. Specifically, here is the info I am looking for:

• Average cost of land or property
• Cost of land or property as it relates to per square foot of building
• Cost of construction per square foot (including elevators)
• Cost of elevators (itemized separately)
• Average rent per square foot per year
• Current rates on construction financing for office buildings

Thanks for all the help, guys. Much appreciated.