Ice,
These 30 per day are no handicapping, correct? You are just playing into soft lines with no opinions based on handicapping?
If that is the case, and I believe I am summarizing what others have said, then you are basically at a 50/50 type situation, with the advantage leaning to you because you bet a number that is not available widely. 30 plays is a boatload of work per day, and I don't think that you affect your percentage too much by dropping from 30 to 20 and risking more per play. The 10 plays that you drop would be the ones I imagine where your "line advantage" is the smallest. One of the biggest problems in business (and you are treating this like a business) is that people put too little value on their time. It would take you much less time per day to accomplish what you want to accomplish, IMO.
Losing streaks happen, but in this case, I think you shouldn't worry about the big losing streak too much since the odds are very low. Plus, with bonuses/scalps/middles, etc., you probably bring the advantage to you even more, further enabling you to take a losing streak in stride.
My two cents. Lot of knowledge in this thread. Gotta love the RX.
HW