Another solution is (with some creative reading of the problem)
allowing us to play Candlestick Maker an infinite amount before our explosive turn. That means we have infinite money. (which wasn't explicitly forbidden in the puzzle)
Hand is Crossroads, Candlestick Maker, Squire, Pawn, Herbalist
Play Crossroads first, then the rest for +Buys, given us 6 Buys
Buy an enormous Masterpiece to gain 40 Silvers.
Buy 5 Feodum, each at 13 points.
Total of 65 points gained.