Why not write some python code to automate it using cronjobs? I’m bootstrapping and I have python code that connects to my credit card processor, banks via api

Why not write some python code to automate it using cronjobs? I’m bootstrapping and I have python code that connects to my credit card processor, banks via api, vendors, slack and email using postmark. End of the month the script generates invoices, emails them to customer/charge customers if credit card is tokenized. Then wait until payment is received in the bank. After which everything is reconciled. Any exceptions I get a slack notification.