I would say each statue costs somewhere between $10-15 in materials and takes about 2-3 hours. Keep in mind that I have been sculpting for a few years so I have become more efficient . (EDIT: Don't misunderstand though, I am not a professional.) :) All the tools that I use probably come to the 100-200$ range but I wouldn't suggest those to start out. I would say get some oil based clay and some basic clay tools and start making things. Look online for sculpting tutorials and research other artists to get inspiration. You can also start by copying things because that tends to be easier than conceptualizing new ideas such as character design. Hope this helps. ALSO I would highly recommend practicing with drawing as having that fundamental understanding of things will make sculpting so much easier.