Ok so i have been using RustEdit to create prefabs. Specifically adding things to monuments.

The plugin would need to get monument coordinates on OnServerInitialized (procgen)

And spawn saved prefabs relative to monuments location and rotation.

I know of a plugin (BotSpawn) that already does this in the code. It fetches monument locations and spawns NPC's relative to its orientation so I think its pretty easy to do and will benefit everyone greatly.

Another plugin that uses a similar function is called Monument Protection by Waggy and uses the same function to add SAM sites to monuments.

Example: I have created an elevator for dome, And would want that elevator to spawn automatically/manually every time i wipe and generate a new map
Example: I have added a Tier 3 Workbench to Outpost, And would want it to spawn automatically/manually at server start.

I have contacted every major dev in the community for this including the RustEdit Dev team.
Willing to pay a good amount for a good quality plugin. an extensive GUI gets extra money.

there is a plugin named MonumentPlus not here  that does this.

Disclosure: Ts3 is the creator/owner of that mod

Ts3hosting, is this accomplished via copypaste plugin?  I don't see any details of that capacity on your MonumentPlus mod page, it just says:

Can add lights and or carlifts to Gasstation, MiningOutpost, Airfield, and Supermarket.
Can add new green card puzzles to Supermarket, Dome, and Junkyard.
Can add BigWheel to Outpost.
Can add Npc Vendors with custom sell items anywhere.
Can use CopyPaste to auto past buildings relevant to monuments see config

Perhaps I need to look into the functionality of copy paste.  

No need to use copy paste if using to add prefabs. in congif you can prefab name monument location and rotation  chat command to get monument name and location.

But copy paste is what creates the building file and your config requires a building file, correct? How does your config identify a custom prefab built in rust edit?

oh ya no you cant past in any custom prefabs built with rustedit  there is no way to do this with rust as of yet.