Cacti are quite easy to overwinter as long as they get sun. (I have my Cacti and Euphorbias in an unobstructed southern exposure which gets a lot of Winter sun). Decrease watering for all (I may water once a month.), a bit more for your 'jungle cacti' (Epiphyllum, etc.). (Humidity is not so important, even for the Epiphyllum.) Also, do not feed them in the Winter, and cooler is better than warm and stuffy.

thank you. they do sit on a southern window cil and a few sit on a western cil.

I'm low on feed so I'll stop feeding now then. it's slowly getting colder.
I have Christmas cactus. I got that to flower twice last year no idea how. sat on very cold windows cil and I forgot about it like one of me orchids and then it started to flower! :)

thank you