for automount, you can use:
easy - cron
complex - systemd
curios, where is the promox server hosted, local, cloud or what?
for s3, why choose dreamhost, not very compatible with s3 standard. and looks very expensive.
is this correct?
per TB for storage between $15.00 and $20.00
per TB for downloads $50.00
that should work for cron, tho not expert on it.
make sure the username used to run the mount can find the config file and might want to use a rclone log file.
curious as to what you pay for storage and download per TB?