"We'll do it as long as it lasts," he said.

Gustavo Gonzalez said he and his family had just enough money for their 10-day vacation, dividing up their purchases between credit cards and the dollars they were able to obtain. He said they'd likely spend less overall and visit the Maya restaurant several times so they could pay in pesos.

"It comes out a lot cheaper for us," he said. "We're paying the same we would in Argentina."