I was doing a yard cleanup and a neighbor asked me to take care of his yard this year, mow fert etc. Supposedly last year he had his grandson take care of his weeds with glypsophate instead of a selective herbicide. how would you economically renovate a yard like that. Also some areas are drought damaged .The yard is mostly Ky bluegrass. I thought possibly burn off , verticut 45deg. and slit/overseed? any ideas?