Disagree with what? I fail to see the difference from definition two.
It does not match definition one, of course, but that had to exist in an effort to be fair to the original commenter. It is not like you are going to go in like a horribly confused idiot and randomly redefine tillage or something. If the OP is using savings in the sense of the positive net value of a home, rationally one will be accommodating to that.
But it doesn't really matter what definition you choose. The math doesn't add up to what was presented under any definition.