Chef was an awesome film!
It is important that we approach our permanent work with the intention of offering our customers something that helps them succeed and not the opposite. I don't know what a shop in the OP's area gets per square foot for a 4'x10' electric sign with an additional logo shape like he came up with, but its worth enough everywhere I've ever worked to warrant far more design effort than I saw initially.
Still trying to wrap my head around whether Gino had directed his comments my way or elsewhere.
I've been to Mexico five times, lived in New Mexico for 11 years whose population is 50% Hispanic, grew up in Chicago which is about 25% Hispanics of every type on the planet, now live in Cali which has plenty of Hispanics of all stripes, love ethnic foods of all types especially Tapas, Mexican, Salvadoran, Spanish, Cuban, Brazilian, etc.., so I'd like to say I've seen more than my share of signs, menus, graphics for hispanic oriented businesses in my day. That being said, I know that I can and do when called upon to graphically reflect a certain culture or ethnicity, I do it with respect and dignity.
I liked the distinction you asked the OP about making between a nice sit down Mexican restaurant and a food truck selling tacos. Whenever I see the word "cuisine" attached to a restaurant, I presume a little nicer place.