There are a couple ways for you to simplify making payment to St. Paul's other than the offering plate. The simplest—and cheapest!—way is to have your bank send a check to the church on a schedule you set.
Most banks offer this service without charge, and it's easy to set up and very safe and secure. Just go on line with your bank and search for "bill pay" or other words to that effect. You could do this in person, too. It would be prudent to call first.
Paying on line with a credit card or debit card is easy to set up, too. It also is safe and secure. St. Paul's absorbs the transaction fees.