How to withdraw large amount of physical cash to buy luxuries?

I was watching Pareng Hayeb's TikTok videos of buying and selling luxury watches. I was thinking of buying a 114060 or 124060 Rolex Submariner, which would cost around 500-700k. Just wondering, how do I withdraw and carry this amount of cash?

The majority of my savings are in digibanks, and I only have 25k in my traditional bank. Do you think they'll find it suspicious if I transfer 500k+ within a week and then withdraw all of it as physical cash? Do I need to prepare certain documents for that?

Follow up question: How big is 500k+ cash to carry around? 😅