Just tried running this today, and while it's not the most powerful combo, it does show some promise.
Stash is normally a terrible card. However, it starts getting better when you either have multiple stashes, or when your deck cycles quickly (e.g with Chancellor)
The other way to make a deck cycle quickly is to make it small. Chapel does this quite well.
Chapel away your deck, while trying to get as 4 or more stashes as quickly as possible. Getting a silver or two on the way won't hurt. Then, each time you reshuffle, line up the draws so that you get $8.
The downsides of this are that because of how the deck is set-up, you'll probably never get the chance to buy a duchy, which can really hurt. Additionally, hand size reducers make this totally unviable, and your buying power gets limited pretty early
I haven't tried simulating it yet, but I did try some solitaire games, and it's somewhere around 13-15 turns to 4 provinces. Of course, the lack of duchies means that may not be very good...