Alright mate.
I dont know from past experience, but I would almost bet on it, that they will rip the money from your hand's as soon as you offer it to them.
Personally I would keep the money as long as I can. Better making interest in your account than in theirs. Also consider how do you stand if you chnage your mind, and want your money back.
I would just pay the minimum deposit if I were you.