Believe me, that's something I've been thinking about a lot. So many times I hear of pets people rehome because "their apartment doesn't allow them" or "there's a new landlord" and so on. It, scares me honestly. As someone who's really started to look around in terms of living on my own lately, that kind of horror scenario where I must choose between living somewhere or my animals pops up in my mind repeatedly. It's not going to happen anytime soon for better or worse (I looked around several nearby towns and nothing is within my budget rent-wise at this time), but it's still a worry.
I already know some animals can't come with me, like my hens (but they're close to their final years anyway), and my giant aquarium might not be on the cards too depending on the situation just out of its sheer weight (you can't put 1400+ pounds just anywhere), but I don't think I could live with myself if I came across a situation where I ended up animalless altogether. That's not acceptable to me.