Build your own Jarvis like an alchemist: pick one component per slot — brain, memory, ears, voice, eyes, hands, interface — and get a working recipe with honest costs. Obsidian included.
People name these builds "Jarvis" (or even "Megatron" — which is really NVIDIA's training framework; in assistant-land it's just a nickname). The recipes below follow the most-copied real builds: OpenClaw, Sid Bharath's Claude Code life-OS, and NetworkChuck's "Terry".