Regarding border crossing.
Appreciate all the replies. This really puts my mind at ease.
I gather that crossing should not be a problem as long as you are calm and honest in your answers, and carry all the required documentation.
As at Simmer points out, I intend to partake in touristy activities to help me answer truthfully. With beaches, beer, and food all around, I am sure there is going to be plenty to explore in Tijuana during my downtime.
Looking forward to the trip now! I will share my experience soon.
Thank you guys.