1. I think your question would be more appropriate in the "Live Cash Game Poker" category. I will ask the moderator to move it.
2. I also think we need some additional information:
Was the request to move to the Hold'em Game made after this player was in the PLO game, or
when he came into room there was no Hold'em seat and so he was playing PLO while waiting for a seat?
And the more I think about it, the more I am inclined to believe that it makes no difference. He would NOT have to bring more into the Hold'em game than the minimum buyin. My reasoning has to do with the fact that he is changing games and nothing to do with the 'size' of the game (the fact that both games have 10/20 blinds)).
Lets see what some of the other Casino Managers have to say.
Chet