Realm Event Countdown (Which realm is closest to close)

is there any way to find out if a realm is close to closeing either before or after u enter the realm? like a number that states how many mandatory quests are left?? would be really helpful for when i wanna farm and i end up at oryxx or vice versa

Well first of all you need to be located inside the realm to obtain object data (UPDATE packet which contains List<ObjectStatus>)
Second, the quests are seemingly random, so there is no way of telling if for example the "Ghost king" object is the last quest.

That said, there is the option of tracking down if and when a realm has closed, and connecting directly to the closed realm IP address (difficult to make, though)

But usually - if the only quests that are left are ghost kings/ancient ents/liches then the realm will probably close soon.

I think someone in this thread could do something very nicely. I wonder if that was a hint?

Would it be possible for each user to individually run it on their own pcs or would it overburden kabam's servers?

To run it, you need to have an active account in each of the servers 24/7. (That's 20 accounts in total)
This is why releasing it to the public would be so destructive.

You can actually see how many people are currenly using it just by looking at the amount of bots close to realms.
Usually there are only two or three (and one of them is fly). - not really much of an impact.
Imagine if there would be 30 bots instead of 3.