The wording is rude, but I'm sure that's because it's an off-the-cuff answer. The concept is valid though - advertise up-front that the lowest cost option does

The wording is rude, but I'm sure that's because it's an off-the-cuff answer. The concept is valid though - advertise up-front that the lowest cost option does not include free support. You can add a 4th option with a link where users can ask for help from other users.