One of the best choice is an old entreprise tower factor server, but it has some downside, it's a bit power hungry, do not work if you can't support the noise at all (tower factors are not loud but not silent either). The positive is that it's really cheap his power (got mine 120$ for 3To, 12vcores, and 32 ddr4 ram).
EDIT : buy some used HDD, easily getting 20tb for around 300$
In fact when using PHP from sury.org the PHP 8.3 is available in addition to PHP 8.2. When using the phpinfo() and comparing the two PHP versions the only difference related a bit to memory are the statistics that are turned on. Nothing really more
I want to install it on a Debian VM inside promox, but to eliminate the potential issues, I tried to install it inside KVM on host, and on a other PC which is running Debian as host. When installing drupal 11 I needed PHP 8.3 so I used the sury.org repo, and I think it the main problem. Because when installing drupal 10 with "official" Debian PHP (8.2) it works.
This is why I made a new thread because the error is not coming from anything else than the php repo of sury.org, no more a "self-hosted" or Linux proxmox issue.
EDIT : tried the same install in KVM and on my desktop, it's not working. Tried Debian 10 with official PHP and it's working
Set the memory to 256MB,
got this error : PHP Fatal error: Allowed memory size of 268435456 bytes exhausted (tried to allocate 262144 bytes) in Unknown on line 0
Mobile is not safe in any kind (instead maybe Linux phones, without mobile network)