This is a nice system that came back to memory from the past, and I used with great success.

If you bet the neighbors of 6-16-26 (European roulette), on the table you will find that with 2 lines (1-6 and 31-36) and 2 corners (13/17 and 23/27) you covered them all except 0. So you have 3 groups of 5 contiguous numbers on the wheel EQUALLY SPACED ON EVERY 3rd OF THE WHEEL. In addition it covers all the finals of 3,4,6 (3-13-23-33,, 4-14-24-34), 6-16-26-36), the finals of 7 (except 7 itself).

With such a minimum bet you cover so much. As a bonus you also cover the rest of the numbers in the lines and quads. So even if you missed the target number you still make a profit if the number is in the 2 lines or the 2 quads.

Minimum bet, contiguous segments equally spaced on the wheel, 6 more numbers bonus profit, how can you go wrong?