Unless you want woodcutting experience, I personally would buy all the willows you need for 70. The amount of money you could make by the time you finish cutting them outweighs the money you save. Once you reach 70, buy yews and bowstrings in 1k increments, I'm not to sure about the current price, but you will make a profit. Also, making money is slower since "string x," I could previously string 3k bows in an hour but now i do 1k. The amount of money you make in a month depends on how often you play. I'd say over two hours (including buying/selling time) you can do 1k or so bows. EDIT:About cutting your own yews, this could work but you will need much higher woodcutting than you have right now (85+) to be anywhere near efficient.