You are bettor off in in townhome or condo.
I work with a lot of investors who rent out properties and can help you in either of these areas.
If you send me your email I'd be happy to send you some past rental stats on 2-3 bedroom single family homes in Tenafly. With this info you will be able to see how long the listings were on market and the agreed lease price. Rental numbers are determined by supply and demand. So I will not only send past activity but your current competition. How much the comps are on market for and actually how many the tenant has to select from. How does your unit compare to others in condition and location. This will give you a good indication of the lease number.