Thanks so much for checking out my post, I really hope it helps.
I have a single cactus, but as I am a bit clumsy, I think any more would be a serious risk of injury for me! The kind I have is a grafted ruby ball cactus.
Agaves are really popular in gardens in my area, but I've never had one myself - I don't think I've got the space. That being said, there is a smaller one in the communal area of my apartment.