I would suggest renting the house if the offer from investor doesn't give you enough to cover all costs and move on. I know that you said you're not interested in renting, but it can be done passively. You can speak to a local Realtor to determine rental rates in your area. If the rent can pay the mortgage after expenses, such as property management, let the home pay itself off.
When it comes to any safety/crime related issues, it's always best to contact the local authorities with all your questions, hear all there is to hear firsthand. If unfamiliar with the area(s) do revisit more than once and at different times of day, possibly chat with locals/neighbors. Real estate professionals are prohibited from steering, enticing a buyer to purchase/rent, or not, in specific neighborhoods. http://www.neighborhoodscout.com/
It's not difficult to find tenants for rental homes. What can make it difficult is the lack of advertising. If you list a rental home with a Realtor you can attract more people and find a handful of quality tenants through the Multiple Listing Service (the database that Realtors have access to). As to determine the average rent in Darby, it varies; you can have the Realtor advise you as to how much you would like to rent to be; and that could be based on how much do you need to make as well as how much other rentals in the area are being listed for in your area that are similar to your home.
If you would like for me to help you find tenants for your rental home and would like to hear what my analysis, click on the link: http://www.themackgroup.org/sell/
If you have any questions, feel free to contact me at firstname.lastname@example.org or 267-918-6322.
The Mack Group
Keller Williams Real Estate - Media
1400 N. Providence Rd, Building II, Suite 1000
Media, PA 19063... more