How to set the 0/0 coordinates origin of a (new) world?

Dear modders,

I am wondering whether there is a possibility to set the coordinates origin (0,0) to a specific location. Best case for an existing world, otherwise I would be happy to do so in a new world or even before or at world creation.

You may ask why? Because I'm running a small modded server for a few friends of mine. Since the start location was basically in no-where range to any structures, only water biome ive moved to a random location far away (-79.655, -81.010 in this case), checked the seedmap and found a spot whit trials, villages and so on. 

Now i want to set the 0/0 there for obvious reasons:

1. some of the mods increase strength of mobs by the distance to 0,0. Even the smallest skeletons and zombies over there feel like fighting a warden
2. The server (sounds strange, cant explain why) get laggy when loading chunks in that area. going closer to 0,0 it doesnt lag at all. Server is hosted at aternos with optimization on, so unused chunks get deleted by the system automatically. Ive already tried to forceLoad the chunks our base is, but this didnt changed anything. Moving our entire base via worldEdit to a location close to 0,0 fixed that...
3. sounds like we are stupid, but we usually get lost by trying to go home. 0,0 is easier to remember than -79943,-80916
4. when using commands that are coordinate based its way more calculation for some of us with high negative values than with positive ones
5. End portals spawn in circles around 0,0 with a maximum range of about 5000 blocks. Over there at -79k,-80k we do not have any chance to get even close to the end

I hope anyone got an Idea of how to modify the 0,0 origin coordinates. If that is not possible after world is created, how do i set it up while or before creation? Would like to create this world again with new origin and move our base in via worldedit schematics.

Best regards