You only have a 40% chance of rolling a field number. And it’s a 1 roll bet. This won’t work out long term. Your gonna lose way more than you win which is going to negate your plan to have free bets. You would be better off to play the inside 4 numbers because that gives you a 50% chance and it’s a multi roll bet which give you multiple chances to win money. Play the inside numbers for $160. Then you only need two hits to win $80. Once you get two hits spread your $160 out to cover all the numbers.
Field is 44% and with the Doubles on the 2 and 12 it's a better bet than you think. I am exploring things, I am not telling people to play one way or another. This is my process, I am showing how I build strategies. Make no mistake, I am a don't player 1st, that plays the lightside behind the dont. This is for the people who watch my channel