In large bowl, combine vinegar, sugar, and salt.
Add cabbage and allow to marinate for 15 minutes.
Fold into cilantro. Set aside.
For cilantro lime crema, combine all ingredients in medium bowl, and set aside..
For fish marinade, combine tequila, southwest spice, garlic and lime juice. Add salt and pepper, to taste.
Cut fish into 1 inch cubes and add to marinade. Marinate for 4-5 minutes.
Skewer fish and cook on grill, 2-3 minutes per side.
Warm tortillas on the grill. About two minutes each side.
Drizzle cilantro lime crema on tortilla.
Top with cabbage mixture and fish.
Garnish with Cotija, avocado, and lime.
