I'm totally with you whent it comes down to avoiding low odds and combos!
I do believe the 5% stakes are way too high / risky and the +20% roi is unrealistic in the long run. If you are able to do that with only 25 bets each week and compound the profit it would turn 1000$ into 80+ Million in the course of a year.
So far the 20% is based on around 600 bets. So maybe as you said it's not enough but im hoping for the best here. Maybe the 5%is a lot but if you select your bets carefully it is not that much.
I will post more info on the options i select. Usually i have odds that are 2.4-2.5. these tips on here i want to be above 2 and have a nice win ratio.
I updated it in the description. You were right 5% is to much. I was thinking of some other gambling investment. 2% is the right number. I hope for a ROI of 10-15% on the long long run.