What's "big amount"? I've charged multiple thousands of dollars on my cards, many times. Of course, you need a high-limit card, but if you have a good credit score, no problem getting at least one card with 20K-30K limit - you could literally pay for a whole car with such a card, if the car dealership agreed to eat the processing fee (they probably won't). And AFAIR there are ways to check how much is left to the limit.

I’ve made an $8000 purchase on a credit card. You can do much more with a quick call.

I’ve even made a $25,000 purchase that I was reimbursed for.