How long does it typically take to build a custom AI-powered dashboard/agent like this?

The builder estimated the dashboard shown - one of the bigger time-savers they'd built - took only a couple of hours to build. The agent itself took another couple of hours. The more complex piece, the staging-table system to prevent hallucination on write actions, was developed in stages over time and was comparatively more complicated. Overall, the builder noted that this kind of development tends to be faster than people expect once you're actually doing it.