Using the power of the internet I have dug up some info about the Staten Island property.
Fist of all, when you are checking out the property at the google link I posted above, make sure to use Satellite view. You can see all kinds of scattered graves surronding the site, as well as a very odd rectangular layout in the back (probably graves?)
In order to find out if the Watchtower actually still has ownership to the property I used some tools provided by the City of New York. Each property in NYC is coded through a serious of numbers that represent borough-block-lot.
Staten Island is borough 5 and the block number for this area is 6110. The lot for the Methodist Church is 1. (giving us a property number for the church of 5-6110-1)
You can do a search for a 'digital tax map' at this website. Here you can see a visual represetnation of the churces property, as well as other properties surronding it.
THE CONCLUSION? It appears that the Watchtower no longer holds the rights to the property in Staten Island! I could have missed something, but as it stands we are at a dead end.
BUT!
Barbera Anderson described the property as being a 100x100 lot (or something like that). For those of you that look at the tax map, make sure to take a look at lot #14. It is a 100x50 lot that looks as though it has been carved out of the churches property. Could it be that this is the Watchtowers lot? Did they sell the property to people who eventually built a home on it? Or was the original wathctower property simply sold to the chruch (and is essentially mixed in with everything that is there).
Without finding the historical records we do not know.
Anybody know where to look? I've never done this before, but it's a lot of fun