what size compressor to winterize

I really really dislike the smell of the pink stuff. I have not used it even in the traps in over 30 years. I blow out the lines and use a wet vac to suction out the traps. It gets cold enough here north of Syracuse to freeze my well water line buried underground. Never had a problem with this method in my RVs. I have to respectfully disagree with the poster who said the lines could still freeze from residual water. Low pressure & high volume will almost make the pipes completely dry!