55 Wall, also known as the Cipriano Club is a fabulous luxury condo building in the Financial District.
The real estate taxes on this unit are currently $350/month and the common charges are $2,000. This building is about as white glove / full service as you can get. Your utility bills will depend upon your usage. Yes, it is a very solidly built building. It was built in 1842 by McKim, Mead & White, famous for many notable buildings in NYC. It was converted into condos in 2006.
There are also many other great condo choices in the Financial District which are also conversions of older buildings, many of them former office buidlings. The neighborhood is becoming more and more residential all the time and many new servics/stores/restaurants keep coming to the area.
I would strongly consider you use a skilled, experienced buyer's agent to take you through the steps of purchasing.
Halstead Property, LLC