You can also ask around...neighbors, coworkers or other friends might give you your best REALISTIC rental income range.
What was the outcome of trying to rent out the townhouse? I would like to do the exact same thing you are doing but I am concerned that I will 1) Not find a renter 2) Not get enough in rent to cover the mortgage. So, were you able to find a renter and if so how much were you able to get?
Click the following URL to see the listings:
You may consider activationg a search at the link below AND then clickking on Schools for each listing you like and also you can check community demographics with another click.
Hope to be helpful
Let me know any Q's