Hello, everyone I need help on this idea I have. So I've been doing good with my credit cards using what I know what I can pay to 0 and don't use my card until after the statement date but now that I want to start a business I'm looking into opening either a chase ink cash unlimited card or Amex blue cash card which one should I open and I will be liquidating or using it and only pay the minimum payment since they are 0% percent cards for first 12 months .now how will this effect my score since my ultilization is going to be high and do I need ein number to open this business cards or need to open an llc?

Yo so I have a checking account with Wells Fargo and I'm trying to switch to a different bank for checkings to create a relationship with a better bank but I have a discover credit card but i am planning to move to chase or capital one credit cards and then hopefully to Amex but I don't know what checking bank I should switch to. So I need advice for which checkings account is best and is chase or capital better for checkings and credit cards ?