"I don't have time to transfer the money,I'm literally driving across the country to the meeting,can we do this tomorrow?" ( It takes 1 minute to pull out your phone, login to your bank app and do it).
"Can we just changes this?And this?And then bombards you with 20 back and forth of last minute changes that have never came up in previous 10 meetings you had" (Either can't make up their minds or simply no idea what they want or just delaying payments).