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.
DnD Class inspiration dump: Barbarians and wild men - Album on Imgur
<p>Наименование — Трубогиб Обозначение — ТГ-140 Типоразмер сгибаемых труб — Ду15 Тип крепления — болтовое, через отверстия в плите Масса [...]</p>