

I’m not an expert, so take my findings with a grain of salt, but the current scientific consensus seems to be:
We don’t know.
Recent studies suggest that the behavior of spiders is more complex than previously thought. They show behavior that can’t be explained by simple automatisms, such as the development of hunting strategies depending on their prey.
Keep in mind that these findings do not indicate any capability to love or to grow fond of someone. But there is an ongoing discussion about whether invertebrates should be considered sentient.
I‘d probably go with a VPS. It probably won‘t cost more than 10$/month, maybe even less, depending on how much heavy usage your Nextcloud instance requires. And you won‘t have to worry about keeping your hardware and network running, which pretty much always takes up more time than expected.
Some web hosters (I‘ve had very good experiences with Hetzner) charge an hourly rate and allow you to preconfigure VPSes with software like Nextcloud. So unless you have specific needs, you could just spin up an instance, check if it suits your needs and, if not, only pay a few cents.