DOT rules do not provide for compensation. All DOT will enforce is whatever the carrier's contract calls for. Here, it seems that the hotel and meals were paid for. I take it that if OP submits his receipts, he will be reimbrused for the taxi. Anything above that is a customer service gesture.

For what it is worth, this is where travel insurance helps. There are a good number of hotels within 5-10 minutes of JFK, all with shuttles to take you there. The second it becomes evident that the flight will cancel, you book one, head over there, deal with your rebooking once in your room. Then submit the room invoice to your insurance and you are done while everybody else is lining up.

If you were sent to a hotel so far away, the better and closer places must have filled. I am very surprised that it took an hour to get there at that time of day. Either the taxi drive was playing games or there must have been an accident. The drive should have been under 30 mins.