LOL look now u insult me LOLWhat question is that? It shows that you don't know how to read and you can't understand what you're reading. I gave you the link and still you can't come up with an answer to your own question. To end this, he doesn't have enough chakra that's why he needed more time.
By the way, if you don't mind me asking, are you elementary level? Just curios you know..
the link u give only stated that minato need more chakra to teleport the kyubi, not the reason why bunta has to hold the kyubi down,
and if u really think that minato can teleport ppl without touching them, then why he don't just teleport tobi right away when he appear ?
FTG is not kamui or tobi space time migration