I am curious how much money he uses in one game, but I am not sure he will tell us since that is part of his secret.
I can only say that he is one of the luckiest gamblers who can win a lot of money and he is a real witness that playing gambling can win a lot of money.
But we must not follow him because everyone will have different luck and I do not have those big luck like him.
Bear in mind that playing continuously does not give you guarantee of hitting high multiplier. It is a matter of luck, you can hit high multiplier fast but you cant even hit it after thousands spins. Indeed more spins = more chance to hit high multiplier but still there is no guarantee. So saying burning a lof of money to get high multiplier is not completely true.
You said already that more spin = more chance to hit high multiplier, There's really no guaranteed but your chance to hit it will be higher so statistically wise its true. Regardless of luck and using only probability, Gambler that has a lot of bank roll usually win that high multiplier than low bank roll since the chance for that jackpot is very slim which low bank roll is almost impossible to hit with few spin. Yes if you are lucky then you can hit immediately but if we use statistics and probability, This discussion can be easily answered by none objective conclusion.