I just don't have the availability and the visual advantage that Pick 3 provides.
Roulette has a tableau and a race track, pick 3 has not, so roulette is visible and pick 3 is not.
Decide on a method/system or whatever and commit to it.
In the past at roulette systems created more loosers than winners, same was said for the lottery.
The only mathematical system standing is doubling the bet for a chance simple. And that has been ruled out by the limits.
If you think that some people double their money consistently with such methods or systems, then check out the prediction statistics on LP. You wil find a handful of people barely winning a fifth of their bets net.
You may consider it a play, a game but don't expect to win with a formula to beat 50% of average disadvantage in pick 3. At roulette your bet will be cheaper and your payout higher.
Bet half of all combinations at pick 3 and you can't do more than breaking even, but at roulette you double your money.