I made this for almost 2 years (thanks to the WorldEdit mod but I work on it for days and take very long breaks)
I made the exterior as accurate as possible (even got to walk around the real Eden Park stadium and take pictures and copy it down). Interior doesn't have to be accurate.
some Mods are required to open the map properly (I dunno if it works with your PC) but I provided screenshots of the minecraft version I'm using and the mods if you want to find them yourself since i'm lazy. XD But mainly I use the Device mod and Furnature mod by Mr Crayfish.
Anyone who wants to make a video tour and upload it to Youtube, go ahead. ;) I was gonna do that as well but my PC is not powerful enough.