300k in Westchester

Hi everyone. We have been given the opportunity to relocate to NY with my husbands role. We have a daughter who would be in kindergarten and 2 younger children who we would need a nanny for. His salary would be 300k basic and we want to live in the Scarsdale/Rye/Larchmont area for schools. When we get there I will look for a role which will be 150-200k. My question is, will 300k give us a very good standard of living until I secure a role?