This is what S-E describe as one of the hardest things they could do, even to just have x-dc comms like linkshells.

Maybe a more feasible solution could be buying guest passes which allow you to temporarily transfer your character to a different data center / world, with restrictions while you are there like not being able to use their marketboard, initiate trades or buy housing plots. Then you can return to your home world when you're done playing with them.