I wrote github.com/nelsonjchen/... for continuous backups but it could be used for evacuation. Unfortunately, the napkin math has this at about $25k round trip to move thru of Azure. But it'll be safe, if not out. I'm not sure if a Google Takeout can work this late but if it can, I can help.

Any way to buy a month of time so a Takeout can be attempted/done? If so, this should be theoretically be able to do it. Though, I've only used takeout for ~1.7TB so far. 250TB is quite something.