Sick setup, man! Lotsa nice looking plants in there, love you nep collection. Bout Mexican pings... they like roughly the same temperature all year but as far as water goes, not at all. Summer are wet, winters are really dry during which they'll form dormant winter buds. Meaning, like mass said, they can, and should stay in a garage or someplace unwatered for the entire winter. You can kind of think tuberous dew in that case.