I played this interesting game yesterday and thought I'd share with ya'll
http://councilroom.com/game?game_id=game-20130117-153555-6a18046e.htmlColony, Grand Market, Hamlet, Herbalist, Ironworks, Menagerie, Monument, Platinum, Scheme, Talisman, Thief, and Walled Village
The important thing to realize about this game is that there is absolutely no need to obtain hands with $5 or greater spending in the early stages of the game. There are no $5-cost cards and GM takes too long to obtain. Midgame you could use Talisman/+Buy to make great use of high money hands, but that simply won't happen early. Therefore, it is possible to to get away with an IW/Scheme opening to work on gaining cheap engine components as fast as possible. Hamlet/Menagerie make an obvious combo and their depletion happens exceptionally quickly. After that, it is just a matter of depleting a third pile while obtaining points. Monument does both of those and can be gained via IW and Talisman. Overall, a fun game highlighting the use of a cheap engine for a fast 3-pile game while still gaining a non-trivial amount of points.
EDIT - To those who have pointed out the most profoundly astute revolutionary idea that Duchies cost $5, by golly you guys are geniuses.
In all seriousness though, $5-cost Duchies are irrelevant in constructing and maintaining the deck, they merely provide a means of controlling the game as 3-pile becomes closer.