Anyone that has looked for an anvil recently, can tell you they are expensive. If you can't afford one right now, get creative. A section of railroad track, is a good (inexpensive) start. You could do what this person did , and add to it.
DIY inspiration: 3 old chairs --> bench. This would look much better if the 3 chairs matched.good use for a set missing one chair, or where a couple chairs have broken pieces and can cobbled together to make one.