Preheat oven to 300 F.
In blender or food processor, process salsa until smooth. Remove 1/2 cup processed salsa and set aside for garnish.
In medium bowl, mix remaining salsa, ketchup, mustard, Worcestershire sauce and brown sugar until combined.
In large saute pan over high heat, heat oil until it begins to shimmer. Add chorizo and ground meat; season with salt and pepper, to taste. Cook, breaking up meat with wooden spoon, until golden brown and just cooked through, about 8 minutes.
Add salsa mixture and water; bring to boil, reduce heat to medium and cook, stirring occasionally, until mixture thickens, about 10 minutes. Taste for seasoning.
Wrap tortillas tightly in foil and heat in oven 10 minutes. Remove and keep wrapped tightly until ready to serve.
To make avocado mash: In medium bowl, coarsely smash avocado halves with fork. Add onion and lime juice then season with salt and pepper, to taste, and gently mix to combine.
Place tortillas on flat surface, top each with meat mixture and garnish as desired with reserved salsa, avocado mash, cotija, Mexican cheese and sliced red onion.