Is it illegal to ask potential tenants if they can pass a drug test? 

The Pocono's cover 4 counties, Pike, Wayne, Monroe and Carbon and they all have something to offer.I always tell people that the Pocono's is about the size of Long Island and it will take you  considerabe le time to visit every hamlet. 

At 1st I considered recording a voicemail along the lines of screening the call with a few questions but after reading your post it made me reconsider.

I 've screened many and still have not found one who meets the rental criteria. 

What are the size dimensions of the units?

@Charles Worth Yes, I think the size of the apartments in NYC is a lot similar to greater cities in Europe.

As long as the relocation meets the two requirements above.Increase in Family Size - A borrower may be eligible for another house with an FHA-insured mortgage if the borrower provides satisfactory evidence thatThe has had in increase in legal dependents and the property now fails to meet the family’s needs; andThe loan-to-value (LTV) ratio on the current principal residence is equal to or less than 75% or is paid down to that amount, determined by comparing the outstanding mortgage balance to a current residential appraisal.Vacating a jointly-owned Property - A borrower may be eligible for another FHA-insured mortgage if the borrower is vacating (with no intent to return such as divorce, legal separation, etc...) the principal residence which will remain occupied by the existing co-borrower.

How do you screen section 8 tenant giving that their rent is warranty?

Determine which size homes are most profitable to flip, then buy the ugliest home in the neighborhood that will still qualify for FHA financing.

Adding a walk in closet to to lower bedroom that will most likely be a guest bedroom or a child's room, wont do anything for the salability or marketablity of the property.With a home of this size you want to sell life style and comfort more than anything else.