I don't think 3 or 4 are possible.
2 would be tricky, it may be possible, but would the AI handle it? Why not just double the cost of steamers and quadruple the cost of clippers for the same effect?
2 would be tricky, it may be possible, but would the AI handle it? Why not just double the cost of steamers and quadruple the cost of clippers for the same effect?