Suppose you are expecting (for example) to buy a 1M house in cash. Before you find the house, you keep the 1M in four different bank accounts with 250K each in order for them to be FDIC insured (this is in the US). But when you actually buy the house, do you have to first put the money into a single account, or can you pay from the different bank accounts all at once?
I'm not sure if it's paranoid to have 1M in well-established bank like Chase or Citibank for a few days. On the other hand, I don't know if would cause any problems to try to coordinate moving the money from four different banks at once. Presumably people frequently pay this (or more) for houses in cash, so is there a standard way to deal with this issue?
edit: The money is distributed among online savings accounts. So one could ACH transfer the money all to my one central checking account (for free), or wire the money from each of the individual accounts but that would cost $100. This is maybe only a minor expense, considering, but anyway I'm more interested in what "is usually done" and perhaps that is just wire transfer from each account (?)