I'd get as close to Addison as you can. I had a primo incall downtown for a year and was surprised at how much more business I got when I headed north after my lease was up. Lots of comments about how they were glad I moved from downtown. It surprised me to be honest. Come to find out most hobbyists don't like the idea of driving to an area they don't already know well. The glalleria is an established location. I'd head to south Plano or north highland park.
If I could afford a second incall I would have one in either north Plano or midcities.
I love these threads. They're very informative. Thank you for starting it. I hope you find a great place.