Mike,
Here is my concern. I think the 11-10-10 plan might very well have been an exhibit for the land purchase and should have totaled 117 acres to MCC from HDC. But, since we are looking at photos of the plan, and they are taken at angles, its quite possible no one has been able to measure that plan accurately.
Looking at Bryan's photo marked above, area JW clearly exceeds area F. No way MCC would have had to buy 3 more acres, since it looks like they gave up 3 or more. If the 11-11-10 Concept Plan road was put on that photo, I believe it would have shave areas M and F down, and maybe increase area JW south by 14-15, to where JW (south) was 3 Acres less than M (north of Ardmore) and F. Then, your timeline makes a lot of sense and it would seem clear that Francis was not accurately describing the whole triangle.
Not to throw any more theories out there, but if secrecy was the key to buying the Dallas Estate, then I think Barkers routing might have actually showed using it, even though not acquired, and that is why they threw it away! And perhaps why they called in CBM so quickly, to see if perhaps he had a better solution, or also felt the Dallas Estate was a requirement. (It was, because that little area along Ardmore is only one hole wide at most, and was unusable)