Tools depend on how you want to start building bows. If you start with sawn planks to make Red Oak board bows like Poorfolkbows.com shows, you only need a couple of rasps, a couple C clamps, and sanding blocks. This would seem to be the way to get atarted build what you call "rough around the edges" bows -- bows that are fully functional, that will teach you needed skills to advance to the next stage of bow building.
If you want to start carving bows out of staves you need hatchets, rasps, scrapers and more.
If you want to start building wood-fiberglass laminates you need a much wider range of tools yet.