I hope by now you have successfully sold your home in Nyack and been able to move into the larger home. I agree with the advice that based on your situation, you would want to have a subject to sale of your current home clause on you purchase of the larger home, except that some sellers won't accept that contingency and you might have to figure out how to buy the larger home without it. It is good protection as long as the contingency is accepted. Did you sell your home and buy the other one?
If not, and if you are still looking for a caring and professional realtor, please call me at 914-588-2365.
If you did, congratulations!
Multi-million dollar producer