Re: What's the best cash crop?
Check with your local Cornell Cooperative Extension first, but if you can't get answers then go straight to Cornell (by phone) and ask; they've been a world of help to me.
My in-laws grow a lot of peaches and cherries on the orchards out in the area south of Lake Ontario, in addition to the various orchards they have around here. The peaches are the best we've ever seen, even from when I was in Georgia (sorry, it's true!). Broome is south of me, what hardiness zone are you in? It may be do-able. Apples, as well as pears and plums to a lesser degree (less demand) are very profitable with the right plan. Grapes also, today especially wine grapes, just make sure you plant vines with a market not only in mind but also with contacts already made to see what they want and how much they want. Finger Lakes wineries can't grow all they need or want due to land limitations, so if you've got the soil, climate, and cultivation practices that produce the character that they're looking for, you'll sell-out everything you've got every year thereafter.
No guarantees in cropping... anything. Wise diversity pays the most in the long run.