I found another way to get 6, and as a bonus I get 5 actions in play.
Kingdom: Peddler, Border Village, Nomad Camp, Squire, Baker, Shelters
T1: 5C; spend coin token, buy border village gain nomad camp.
T2: 2C, Nomad Camp, Overgrown estate, Hovel; play nomad camp, buy two squires.
T3: Necropolis, Border Village, Nomad Camp, 2 squires. Play necropolis, border village, nomad camp and two squires for buys. Have 6 buys and 5 actions in play, buy 6 peddlers.