I think a Turkish restaurant would be a great idea. Two Turkish barbecue restaurants opened in my home town a couple of years ago. They are now so busy that you can't walk in off the street in an evening and they have to have just two set sittings for dinner!.
In terms of location, there are not too many places to 'avoid' but you may want to have a look at the parade of shops and restaurants in the area near Aloha gardens near the Point Bar and Opencor. This area is up and coming and has a good year round residency level.
Good luck!
Christian