(This is a custom dimension it will not be super light on the server it will need some resources. I tested it, and it worked fine on my paper test server while set to 2gb)
(so it shouldn't be too resource expensive to use all in all but more so than let's say a colored sign plugin by quite a bit)
(Note: this is the first beta test release)
One thing for developers to note, the crying portal is not intended to be entered in creative mode, 99% of the time if you are in creative the games native quick teleport to the default nether will take you there. So set yourself to survival use the portal then switch back if need be.
This beta does not contain any config options at the time being.