I also found this video thats less expensive, gets you alot of gold and wither heads https://www.youtube.com/watch?v=CP0gAYKnCS0
Will this be public. Also, this is insane. I'll see if I can get you some obsidian if this will be public.
I remember this design from a year ago the guy who made it claimed it was cool however caused a lot of lag or something because of the all the portals and/or all the pigmen spawning from them. Even states you need a good computer for it. From what you have said the design you want to go with is just a copy of the guy who made a video on it. The other thing is the fact is that there is no mob cap with this design so they will just keep spawning until the server crash's. So I doubt this will be allowed.
Hey m8. You can make a more efficienct and more faster gold farm if you use the new design for endermanfarm in the nether. This design you made is actually silly and takes alot of obsidian So if you really want a efficient gold farm then use the piston&wire method instead
It is more efficient yes But i hate nether - and putting half slabs on 20k blocks is kinda boring aswell XD