This is interesting pkspins and I have considered some slot play to supplement doing it through VP.

My mom is a Seven Stars slot player and she actually does pretty well. She was telling me about some machines that do basically what you are saying here (TC builder with minimum input and less loss). She even made the exact same comment you did- "just play until you're bored and then move on"! She also mentioned the 9 line older games.

If you know the names of the specific machines you are talking about above that would be great!