Tortillas are not that based, corn tortillas make real tacos and good chips, bread is the best here.
If you let your bread dry out you have bread crumbs for food and stretching ground beef.
Most people let their bread mold because they keep it in a bag and dont let the moisture escape. Also stale bread can be made into fresh bread with a small amount of water and a oven.
Also Mexican bread is the shit and people dont give enough love to bollios, pan frances, and pan de auga bread for the day of the dead feasts.