Solar power would be easy in the day, wind power would rule the twilight. Would they have to industrialize to colonize the night?
But perhaps not stuck facing the sun. Mercury is tidally locked, but has a 3:2 resonance: three rotations in two revolutions. If Trappist-1b did that, they’d have a day-night cycle of 3 days, which wouldn’t be too bad.
Flares might be more of a problem in that close, even if it is a small star.
