What is the bare minimum needed for keeping clones alive

I started my first grow 3 weeks ago in a 40x40x120cm (1,5x1,5x4 ft) grow tent. I am about to put my first plant in to flower and i want to cut some clones for later, would it be possible to keep them alive in a space bucket for the 3 months it takes for the plants to be done with only a 9w 800 lumen LED light and the proper nutrients?

I've read about putting cutting in the refrigerator.

LINK to growweedeasy.com how-to-keep-a-bonsai-mother-for-unlimited-clones

Dont know about the bucket or fridge, that seems to add way too much difficulty, its just a really slow/ low light veg and snip all the fans off once a node starts growing, get clones from the nodes.