Apart from paying £2k a year for a tool like ShareGate, what is the easiest way to copy content from one tenant to another?
Check this informative article having Information about manual migration of SharePoint Online content:
https://support.microsoft.com/en-us/kb/2783484
Also have a look on this earlier discussed thread –Â Copy content from one o365 tenant to another – SharePoint online
Alternatively, give try to this Lepide SharePoint migration tool, which lets you to move content from one SharePoint /Office 365 tenant to the another.
Hope this helps!
