Islam Critiqued flies over a complex issue; Abraham binds his only son in Jerusalem?

In answer to the video "Abraham and the Kaaba: From Borrowed Stories to Sacred Scripture"

Putting aside the fact that, in the presence of his older brother Ishmael, the literal, firstborn and legitimate "only son" could never, at any point, have been Isaac, another inconsistency resulting from the identification of Isaac with the son of the sacrifice is that the HB states Abraham had to journey from Beerseba where he dwelt with Isaac before and after the event of the sacrifice Gen21:31-34,22:19 to mourn Sarah's death in Canaan Gen23:2.

Was Sarah living away from both husband and son all this time or just after the sacrifice and why? Jewish tradition suggests she dwelt in Canaan before Isaac's near sacrifice since it is this news that sadenned her to the point it caused her demise Gen.Rabbah58:5. The only way she could have known of the incident while in Canaan was if Abraham and Isaac had left for the location of sacrifice (ie Moriah) from Canaan itself. However we are told Abraham and his "only son" left for the sacrifice from Beerseba, not from Canaan. And by the way, it would have never taken Abraham 3 days to reach Moriah in Jerusalem, from his location near Hebron, which is less than a day's walk.

The only way for all these conflicting elements to come together is to say that Abraham had left alone from Beerseba to the location where he had settled his "only son", and from there to the location of the sacrifice. The Quran and the traditions say he left to Mecca where he had settled his firstborn Ismail, and from there to Marwah nearby, for the sacrifice. Interestingly, this Marwah which the the HB calls "Moriah" is located in 2Chron3 in Jerusalem and yet when David purchases the site later on from a Jebusite, neither the writer, David, the owner, the angels, nor God or any prophet make a connection between that site, and one of the most significant locations to Judaism, the place where the event of the near sacrifice occured. Instead it is simply labelled the "threshing floor" of the future Temple.