Ok I have read many ways of doing this. However I am still unsure of how to do the tortillas. How can I keep warm tortillas for 100 people. Could I heat them in foil stacks and then put them in an electric roaster ? The corn tortillas I have baked and then kept warm in a roaster, but I have never tried the flour . Also would you use electric roasters for the beef and chicken or crockpots. I think roasters seem easier , but would it be overkill?