moving over 7000+ events

one of our clients (https://45thwardmom.com/) uses this calendar, and we’re moving over the hosting to managed wordpress from cpanel (new site https://c3d.a80.myftpupload.com/).

I’ve tried every plugin (updraft, all-in-one migration, etc) and can’t seem to not time out moving the events over (they’re a few gigs). anything you’d recommend? everything moves except the events from your plugin (they crash). any help would be appreciated!