Much often you will need a constant SSH tunnel connection, to avoid the administrative load for those tunnels after a reboot is to configure them as systemd services and use SSH keys to avoid passwords.
Also its nice and super helpfull to create the systemd service as a template that can accept tunnel parameters from a file, this allow very easily to manage your tunnels (add,delete,modify,start,stop).
https://medium.com/linuxstories/linux-how-to-create-an-ssh-tunnel-as-a-systemd-service-73e6e0fff19b