Tuco is getting worried and suggests that they all move to Mexico so that the government will stop tracking them. Walter and Jesse aren’t keen on this idea because it means they’d have to give up their family, and that’s a cost Walter isn’t willing to make, even for lots of money. The whole reason he started making meth was to support his family, but Tuco doesn’t seem to understand the issue. He suggests that he can just get another family, implying they are substitutable.
See more: cost benefit analysis, immigration, migration, opportunity cost, psychic costs, substitutes
The Economics of Breaking Bad 