I've hit this one twice, both in Gardens games. Once with ironworks, once with workshop.
Normally, of course, it'd be ruined by using gains to gain those actions, but the way that my draw on those games panned out it was always seemed better to buy the ironworks and gain the gardens.
I think its probably more likely with workshop than ironworks, as with ironworks you might often be chaining (gain ironworks X-1 times, then gain garden) where X is number of ironworks in hand. with workshop you'll more often be on workshop to gain garden, then spend <$4 on workshop.
I'm pretty sure I've also come close with Stables games (though normally 2-4 Stables plus treasure does it).