(I know that this is about selfhosting, but I am forced to use cloud services due to it not being viable to selfhost because of DSL internet speeds in my house, and I need this to be accessible outside my home.)
I recently made a Linode account (and got the free credit), and I am planning on only paying $5 a month if I can. I noticed that Nextcloud AIO (from Linode "Marketplace") ran very well on the lowest shared CPU plan (1GB ram, 25GB storage, 1 CPU core (CPU seems to me an AMD Epyc?)).
Will it be okay for me to host a Wordpress website and a Nextcloud instance from the same server? I will be using Docker/Podman, and only I will be using the Nextcloud instance.
This lines up with my experience. I have nextcloud and wordpress on two different vps's and just checked their ram usage.
Caveat to the above is that nextcloud is installed bare metal rather than docker and I have both nextcloud and wordpress set up to use object storage as the media back end.
edit: To add to this OP, the reason we are only talking about ram numbers is that the cpu usage for these applications (with primarily only a single user) is pretty much zero most of the time, so you aren't going to be limited by the single core machine.
Also, depending on your use case (large amount of data on nextcloud or large media files in wordpress), you might run out of disk space pretty quickly. In those cases, you should consider using object storage as your nextcloud or wordpress media backends as it is cheaper than block storage (there are plugins/tutorials to configure object storage and Linode offers it).