When trying to use
free tier dynos with Heroku Teams I am receiving error messages.
free tier dynos aren't available for use with Heroku Teams https://devcenter.heroku.com/articles/heroku-teams#pricing-and-limits
For cost savings it's recommended to scale the dynos down when not in use. There are also add-ons available that may help automating more complex availability requirements https://elements.heroku.com/addons/#dynos