Your post indicates that you are currently living in Park Slope and are a buyer, but your question relates to Park Slope rentals. Rentals in the heart of Park Slope are quite steep and a 2 BR at $1800 max per month may be very difficult to find unless you will consider Park Slope South, or as a Janine suggested, Windsor Terrace which is a lovely area that is nearby, close to the city and transportation. Another possibility is doing a share. As a start you should look on Craig's List to get an idea of the price of rentals to give you a perspective. Here is the link:
Hope this is helpful and if you have further questions do not hesitate to contact us at 917-593-4068.
Bonnie Chernin & David Rogoff
Feel free to contact me in a few months.
Licensed Real Estate Saleperson
Weichert, Realtors - The Franzese Group