I have had many issues with the chunk loader Weirding Gadget from The Weirding Gadget mod (they keep despawning/disappearing on me whenever I logout or forced off by a server reboot/restart), so I am here to suggest another chunk loading mod called ChickenChunks. I have yet to have an issue with ChickenChunk's Chunk Loader. You are able to configure its field of operation both on the user side and server side (meaning admins can set the maximum size that players can set their Chunk Loader to). This theoretically means that players can place less chunk loaders at their bases (potentially even only having one Chunk Loader per player if they like keeping their base either small or only expand their base vertically). If the Weirding Gadget causes lag, this would theoretically reduce lag caused by having multiple Chunk Loaders from The Weirding Gadget (which I have noticed is not a good chunk loader at all in comparison to the ChickenChunks Chunk Loader).
If you guys are able to add the ChickenChunks Chunk Loader to the server, please do so. If not, I would not mind hearing the reasoning behind the reason(s) why it cannot be added.