I am considering buying a ticket which involves an flight from Moscow to JFK on Aeroflot, arriving at Terminal 1 at 5:10 pm and a onward domestic flight on Delta at 7 pm from Terminal 2. How doable is this for immigration and transfer (non-US citizens)? The passenger will need a wheelchair (can walk but very slowly and I am ordering the service to help him out).

Delta flight is the last of the day, if anything happens he is stuck in JFK overnight so if this connection is too tight I'd rather get smth with a longer layover.