Also, why do you use 12 VMs? The one docker instance can handle multiple nodes, you just need to have unique ports for node and dashboard.
Also, please do not publish your dashboard to the internet without any protection - anyone will have an access to your dashboard, use this method instead: How to remote access the web dashboard - Storj Node Operator Docs or [Tech Preview] Multinode Dashboard Binaries
Starting multiple new nodes is not advisable: each new node must be vetted. The unvetted node can receive only 5% of the customers uploads until got vetted. To be vetted on one satellite, it should pass 100 audits from it. For the one node in the same /24 subnet of public IPs it should take at least a month (or longer).
We filter out nodes by /24 subnet of public IPs, all nodes behind /24 subnet of public IPs are treated as a one big node for uploads, and as a separate ones for downloads, repair egress traffic, audits and online checks: we want to be decentralized as much as possible.
For multiple vetting nodes in the same /24 subnet of public IPs the vetting could take in the same amount of times longer as an amount of such nodes.
So it’s better to start the next node only when a previous one almost full or at least vetted.