RE: How to survive on 30000 Naira (65USD) per month.... sanity check and call for help.

I also believe there is a way out.
Positive rich ways, and you outlined the important useful ones.
Especially when it comes to our diet.

If the family can also plant and grow some crops, it could help a bit.
But 30,000 naira for a family of 4 for a month is still going to be a fight.

I could help out with few price of the food items listed from my end.
And prices differs based on location and where it is bought.
But will still be close.