Apologies if this has been covered before (probably has but I couldn't find an answer by searching).

I have a purchase coming up of close to $30,000 and instead of using my normal credit card which doesn't earn AAdvantage miles I'd like to use the Citi AAdvantage card and earn straight-to-my-AA-account miles.

If I have excellent credit, pay all my bills in full at the end of each month, and have a decent salary will Citi scoff at such a first purchase? Is it possible?

Thanks in advance. I'm a bit timid when it comes to credit cards and have had a grand total of two in my wallet for many, many years.