Once-off 4TB upload to Google Drive with slow internet?

Before I go fully nomadic, I hope to backup all my files that are currently stored on external hard disks. I think the best approach is to use a cloud service like Google Drive (I already use that and am familiar with it so will use that unless there's an obvious reason not to).

The problem is I live in Australia which has quite slow internet to begin with, but my particular plans are poor, even for Australian standards; I have 5G mobile, which at ~10mbps upload, would take over 30 days of uninterrupted uploading to move 4TB, presuming no outages, errors etc (and my other connection is capped at 200GB per month)

Is there any work around, ideas or services I could use to upload 4TB, preferably in under a day?

I had the idea of finding communal work place with very fast upload speed and try to go there on a weekend or time when it's not busy. Or even a hotel.

I know for extremely large uploads, cloud providers will sometimes drive a truck to your business (e.g. AWS Snowmobile) to collect data on disks. But I think the service is more aimed at PB scale.

Any ideas?