I'm well on my way to becoming fully self sufficient with <= 2000 workers throughout the run
Solar panels are almost free at this point, I trade the cells for more quartz and they take barely a trickle of steel to make, so it's mostly the power for the arc furnaces. I'm thinking of mothballing the reactor entirely and switching over to fuel gas until I get rid of all the dirt and build enough solar panels to run everything. My desalination setup is running on hydrogen already, it would take ~45MW if I were to use electrolyzers for that. Another ~40MW worth of hydrogen is used by vehicles, ships and fertilizer/ethanol production. I will aim for 120MWp first, since that's about the point where I would have to start thinking about storing solar energy in some form.