After a long thought, the solution should be to go with the flow of numbers, trying to catch the wave of repeats; I am dropping the twenty numbers combinations for now and play a lot of repeats for while.
Combinations of 9 numbers (2) at $1 each:
02 03 04 07 14 20 27 35 42…01 02 06 38 41 47 54 63 66
Combinations of 8 numbers (2) at $1 each:
01 27 33 42 45 63 65 70…06 15 35 39 42 48 53 56
Combinations of 7 numbers (2) at $1 each:
01 12 13 20 58 63 66…02 05 13 41 48 65 70
Combinations of 6 numbers (2) at $1 each:
01 03 06 12 27 54…04 06 33 47 62 63
Combinations of 5 numbers (2) at $1 each:
01 38 41 47 70…14 20 35 45 63
Good luck to all of you
. Babar 
Combinations of 9 numbers (2) at $1 each:
02 03 04 07 14 20 27 35 42…01 02 06 38 41 47 54 63 66
Combinations of 8 numbers (2) at $1 each:
01 27 33 42 45 63 65 70…06 15 35 39 42 48 53 56
Combinations of 7 numbers (2) at $1 each:
01 12 13 20 58 63 66…02 05 13 41 48 65 70
Combinations of 6 numbers (2) at $1 each:
01 03 06 12 27 54…04 06 33 47 62 63
Combinations of 5 numbers (2) at $1 each:
01 38 41 47 70…14 20 35 45 63
Good luck to all of you

