Should I open a Business bank account when flipping?

[Tatiana C.]

Hello my fellow investors,

I'd like to ask your opinion regarding bank accounts. At which stage do you guys think I should open a business bank account? 

My plan is to flip houses and wholesale deals. I am in the earlier stages of investing, but I've already been spending money with direct mail, LLC fees, website, training...all of these I used my personal credit card for payment.

Appreciate your help and opinions.

Thank you so much.