u/BabblingIncoherently

I finished It Came From Planet X, got the popup saying I'd unlocked Franklin's Martian Memorabilia by Tinuvia, sent them to Sunshine Tidings and built them their special house. They've moved in so I tried to build the store for Franklin but it doesn't show up in my list of commercial plots. I assigned him to the plot and refreshed the plot cache but it still isn't there. Please help.

If I have resources set to simple, does that mean the only industrial plots I need are junk plots? Or will junk plots not work because they store in the workbench and not virtual storage? Should I build different types in each settlement, even on Simple? I don't understand which plots I need for each settlement.