It's all relative. Living here I have exchanged more than a hundred thousand dollars. And having worked on countless RV's down here, many if not most arrive with more inventory than the local tienda. The real hoot happens at the end of the trip when they give it all away to increase gas mileage on the way home.
Leaving a tip for a meal that will pay for a quart of gasoline is sorta embarrassing don't cha think? Or maybe buy a roll of toilet paper. Leaving an occasional large tip in a business you frequent will sometimes pay dividends you cannot imagine. One day a waiter told me about a super tire sale and I got a set of General tires at a savings that equaled all the tips I had ever left him times ten.
A weak peso leaves store shelves stocked with "the basics" that few tourists purchase. And no this does not conflict with the stuffed motorhomes above that arrived when store shelves were jam packed. Sugar free food, diet foods, condiments and snacks are neat but stashing ten pounds of flour and boxes of Cocoa Puffs?
Remember when business slumps RAISE PRICES! So Mexican products raise in dollar terms. I long ago learned to live with this mind set. My made-in Mexico medications are undergoing a mind-boggling upward price spiral. Some are thirty-percent higher in DOLLAR VALUE than they were six-months ago. I guess I need lawyer grade explanation now. Medicine from private label Mexican companies manufacturing 100% made in Mexico medicines that have zero to do with licensed medicines from abroad.
The local RV park has raised prices five times in as many weeks. So the perception of a weak peso / better value Mexico needs further study. This ain't the seventies, folks, cell phone internet. Instant connections to SHCP SAT official tipo de cambio sites.