Was this with room and board? FWIW, there are many college degrees in the USA that are in the $7k/yr range, and many of then were around $20k total prior to the last round of state-level austerity in the USA.
Getting a US college degree for under $20k is still very possible if you a) commute and b) do the first two years at a community college (typically closer to $2k/yr, or $18k-$21k for 2 years cc + 2 years state college).
With a bit more public subsidy (or differently targeted subsidy), many US colleges could be well within the $20k USD range for commuting students. And some courses of study already are.