Auto paying bills - The only bills that are ordinarily auto paying are those where the charge does not change from month to month although they will probably change annually. Where billing statements go directly to the bank, like a credit card or utilities, most likely varying each month, the account holder must release or approve the check payment.
Things to think about..are you going to pay all the household bills or are the kids going to live rent free? Perhaps they will be responsible for the food and other things that need to be purchased routinely as their share. These things need to be discussed so there are no misunderstandings, hassles or surprises.