I Was Paying $300/Month in Lost Hours to Self-Host Claude. Then I Did the Math. Let me tell you about a Saturday afternoon I'll never get back. It was 2 PM. I needed Claude working in Nexus for a client project due Monday. Instead, I spent four hours debugging API key rotation, hunting down a rate limit error that turned out to be a misconfigured header, and reading through Anthropic's documentation for the third time that month. By the time it was fixed, the afternoon was gone. Here's the thing: I'm reasonably technical. I know my way around a terminal. I've set up infrastructure before. And I still lost those four hours. That got me thinking: what is self-hosting Claude actually costing me? The Hidden Math Behind "Free" Self-Hosted Claude When developers talk about running their own Claude setup, the conversation usually goes to API costs. Fair enough — that's the visible number. But it's not the whole picture. Let me walk through what I found when I actually did the math.…