[DumpsterDiver]

I haven't read it yet, but maybe there are answers to some of your questions here:

The Fiscal Cost of Low-Skill Households to the U.S. Taxpayer
www.heritage.org/Research/Welfare/sr12.cfm

Printer-friendly version
www.heritage.org/Research/Welfare/upload/sr_12.pdf

Executive Summary: The Fiscal Cost of Low-Skill Households to the U.S. Taxpayer
www.heritage.org/Research/Welfare/sr12es.cfm

[WhyisaTexasgirlinPA]

I didn’t see what I was looking for, but thanks for the attempt