The decisions of which plants to keep must have been tough, Lin!
I forgot to say that I didn't jump straight into putting a dozen diff plants in pots together all at once. There was an intermediate step of overcrowding when small pots were sitting in/on bigger pots. That was actually good 'practice' to gauge light compatibility, and test-drive the appearance of various combos. A group pot isn't a life decision though. Whenever you're repotting, you can re-arrange/separate things to keep everybody happy.
There's also the tactic of hanging other pots from the rim of a first pot, as long as it is strong enough to hold the extra weight.
There are various styles of stacking pots. Tall, thin plants (and/or trellised plants) are easier to have around than a plant that takes up a lot of horizontal space.
Developing a taste for diminutive plants can help also. Even though I have various rooms in which I can put plants, I still don't have room for something like Monstera or a large, braided/weeping Ficus tree, although I'd love to have both of these. Gotta be realistic about how much space is in the house.
