You may want to spread it, check with books may only take X amount at at a time, then the that line may be adjusted. For tax purposes you may want to do smaller bets all over that equal 100K depending on how you do it.
You should also get on the phone to check how much they'll let you put on a game. Should be higher than the internet limit, could be that they need money on that side of the game and would gladly take all of your action.