How many pesos should I bring to Mexico?

Could you please elaborate on the factors that determine how many pesos I should bring to Mexico? I'm considering the length of my stay, the cost of daily expenses, and any additional expenses that might arise. How do I estimate these costs accurately? Is it advisable to exchange my currency in advance or should I wait until I arrive in Mexico? And what about using credit cards or other payment methods? Are they widely accepted in Mexico? I'm also curious about any potential exchange rate fluctuations that I should be aware of. Could you provide some insights on these points? Thank you for your help.