Multiple Site Migrate help

I am using vultr VPS, and I realised after scaling the VPS up that they don’t support scaling down later. Now they have asked the only way to scale down is spin up a new server.

I am loosing money with the server and want to migrate all EE sites to new server. I know there is a way to migrate here but I have almost 15 sites. Is there any easy way to migrate all sites to new VPS for multiple sites running on EE?