I'd like to think when you have one, what's one more but it's not that simple. You have to factor in things like time, money, and husbandry requirements expecially if you're looking to keep chameleons of various species. When I started keeping more than one, I also started keeping and buying crickets a thousand at a time, so I had to factor in the space the crickets were going to take up and the care they needed. That goes for the hornworms that I breed for them as well. I also upgraded to an automatic mister rather than misting each one individually by hand several times a day so then I had to rearrange the room they were in to allow the tubing to reach all of them but still have enough space between them to keep them from getting stressed out from seeing each other. Then there's the cleaning of the mister that's required between each refill. I have a cleaning schedule because I clean their cages once a month but I'm not getting them all done in one day. They're very large cages with lots of plants an artificial vines in them so cleaning them thoroughly is time consuming, I do one every weekend. I think the last thing is that it costs a lot more. More UVB bulbs, more supplements, more enclosures, more plants (and I only buy live but do use some artificial vines to help fill it in), more money at the vet and we all know that can be hundreds if not thousands of dollars for just one visit. With that being said, it's my opinion, if all of those things are met and manageable having more than one cham is wonderful. I love watching them eat, I obsess over their poop, it's relaxing to just stand in front of their terrariums and watch them, it's amazing to see them change colors, and I love the feel of there little feat pinching my skin when they walk on me. I get so much joy, satisfaction, and reward of caring for them and knowing that I'm doing it properly. I absolutely love it and the extra work is worth it.