Jason and Hannah, thank you so much for your input and insight. It is very helpful.
As far TCO, I am not that concerned, the building has only been up on StreetEasy for a few weeks. I went there again today and they were cleaning all the condos in preparation for an open house tomorrow and they had a sign on my unit that said "In Contract". So going today eased my fears a bit.
My main concern right now is the 421A. I am not quite sure how that works once the sponsor receives TCO. Can someone walk me through the process? Say 2 units are sold, does closing take place shortly thereafter? If so, then I would be paying property tax each month until the final 421A approval comes through right? I am just trying to wrap my head around the logistics of it all.
I am already having the sponsor pay all transfer taxes and their attorney fees. Can I ask for more concessions? Say like $10K closing credit or is that pushing it? Since I am the first buyer, I should have some leverage right?