Wages in the past have no relevance to now. The cost of living now in San Pedro is such that I imagine it must be extremely difficult to live at even the most basic level on Bz$190/week. I haven't said before, but this guy has a wife and children in Orange Walk and he sends half his pay to them each week. He's only in San Pedro because there's no work at all near his home, and $190 is better than nothing. But he is right down at subsistence level.
How your family managed to progress over the years is also irrelevant. Some people do manage to do very well here.