Show HN: Sunk Cost – How long until a local LLM rig pays for itself?

Sunk Cost is a tool that calculates how many days a local LLM rig must run to offset the cost of renting the same model by token. It inputs the hardware, the chosen model, and daily token usage, then outputs the pay-back period. The focus is purely on raw cost savings, not other motivations for owning hardware.