With $0 in first turn, and Colonies.
KC-KC-Scheme-CR-Coppersmith
1) KC-KC-Scheme-CR. Buy 4 Copper, put KCKCCR back
2) KC-KC-CR (draw deck), Scheme-CS, play 4 Copper worth $4, buy Colony, put KCKCCR back
3) repeat.
or
KC-KC-Scheme-CR-Coppersmith
1) KC-KC-Scheme-CR. Buy 4 Copper, put KCKCCR back
2) KC-KC-CR (draw deck), Scheme-CS, play 4 Copper worth $4, buy Colony and 3 Copper, put KCKCCR back
3) KC-KC-CR (draw deck), Scheme-CS, play 7 Copper worth $4, buy 2 Colonies.