Greg, I hear what you're saying. I have 1/2 acre and re-soding my entire back yard is too expensive.
Chemicals are not that expensive, and are effective for their uses. I'm not expecting a great lawn over night ... I'm trying to give the grass a fighting change.
Bremuda seed is cheap, will outgrow most weed types, and SA might snub it out later. I'm ok with that.
Making lawn care easier!