echoing previous sentiment, using the current version of the picture I see...
Quick eyeball says you could lose 64 by getting rid of the bevel on the top of the bucket (not a place you'd really expect anything rounded; they'd just be cut off at that point), plus a few extra by adjusting the triangle divisions around those holes. The tops and sides each have a split that goes out to the middle of that side's edge... If you look at the bottom, you can see where it uses 3 triangles instead of 4 and avoids splitting the outer edge.
Rough guess is another 24 you could trim off there; that'd put you down just under 250 tris. Could also drop from 8 divisions between the two handle/hole bits to 6 without looking too blocky. Because it's already 'built' with flat objects (the bits of wood) I think you can really get away without having as much roundness.
If nothing else, those reductions could also give you some room to vary up the silhouette a bit - some planks are longer than others, a gap in between, etc. Which would add back a few tris here and there but make it look even more detailed than it is now.