HPS can be cheap to buy up front but buying $100’s of dollars worth of bulbs every few months get’s old. An oil-filled radiant heater is a good option as they don’t produce light for cold nights.

The pic with the damaged/deformed leaves is not bug damage but root stress most likely caused by the pH being out of range when the leaf was forming. Initial signs are leaf twisting/deforming that will eventually start showing weird splotching marks. When just the edge of a leaf curls up a little, that’s from humidity being a bit too low for the temp.