Necro, but I'm interested.
1) Pirate Ship is obviously at the top. As long as you can keep trashing Treasures (of which there are well over 50 in the supply), you can keep stocking up.
2) Venture - play it, trip up the other 9 Ventures, then hit, say, a Bank.
3) Bank - just play every Treasure in the supply first.
4/5) Vault/Secret Chamber (tie) - a little harder to do, since you not only need a huge deck, but a way to draw that huge deck without playing half of it.
6) Salvager maxes out at $11.
7/8) Death Cart and Platinum have $5.
9/10) Harvest and Baron can yield $4.