You ought to pay heed that haram is haram, and you cannot justify yourself to do haram (forbidden) as you said:
In our world it takes a great deal to look after a family especially
if you have nothing to start with. When you have a wife and kids it
really hard to look after them and satisfy their basic needs. Instead
of begging or doing crimes, does doing a proper job even if it is
haram in some sense, affect your after life?
Your issue can be like the following matter to some extent (I can remembered that I heard a story ...) that:
(approximate story): Someone was stealing (I reckon pomegranate), then
was helping them to poor individuals (as charity), so the Prophet
(peace be upon him and his family) considered his practice as a haram
Otherwise, if your words were right, then Allah would allow poor people to steal or do haram activities for their families (for their expenses)...
Eventually, there could be two final solutions for you:
- Endeavor to deal with the current condition.
- Endeavor to find a halal job (even with a lower income).
By observing the items above Allah (God willingly) would keep blessing (Barekah) in your money... anyhow, hopefully you do not do haram (although it seems you won't do that, since it was significant as you searched about that).