Yeah, you are.

You didn't read my whole post, dummy. The cheaper alternative wasn't
TSP and a scotch brite pad. It was using a thinned mixture of mud. I
suggest a remedial reading (and typing) class.

A gallon of Kilz??? You don't have the slightest idea about the area I
am dealing with. . . Try four rooms with cathedral ceilings all covered
in high gloss paint. It would be more like 10-12 gallons of Kilz vs.
one five gallon container of mud, thinned to paint consistency. You do
the math, if you are capable.