you can use such as per definition number three in this dictionary and other dictionaries.
you can not use so according to the same dictionary and other dictionaries not even when using definition number 2.a (1) or 2.a.1(2) or 2.b here
this is a mistake many people make.
"our village had such little money ----" as per the first definition for such I gave you = a degree of poverty.
"our village had so little money" although often colloquially used it means the money was "so" "little". * the incorrect edit I made read above.
We use so to replace or emphasise an adjective.
"I love you so very much"
"You are so disgusting"