Double Colony turn 2:
Kingdom: Pooka, Tracker, Fool, Pixie, Fortress, Villa, Den of Sin, Baker; Advance, Borrow; Shelters.
Turn 1: Cursed Gold, Pouch, Lucky Coin, Necropolis, Hovel: Play treasures for $5 and 2 Buys, gaining Silver from Lucky Coin. Advance Necro -> Fortress, buy Den of Sin, play Den of Sin.
Turn 2: 3x Copper, Goat, OE. Den of Sin draws Cursed Gold, Fortress. 10x Advance Fortress -> Villa, play Villa. Play Fortress, drawing Pouch. Play Goat, trashing OE, drawing Silver. You have $11. Play Cursed Gold, Pouch, 3x Copper, Silver, spend Baker token, and buy Borrow, for $22 and 2 Buys.
Of course Borrow isn't necessary; replace it with Dominate and you can buy Dominate turn 2 and still have $7 and a buy spare.