One of the least expensive streaming services is Philo. We've been trying it out, and like it. It's got some good points, and some bits we don't like.
Philo offers live streaming of some cable or satellite content. With two levels of service, priced at $16 for 37 channels and $20 for 46 channels, it's one of the least expensive live streaming services. There are no premium channel add-ons such as HBO or Showtime. Keep in mind, though, that these services have their own stand-alone offerings.
There is a downside for sports fans. Philo has no ESPN, no Fox Sports, no sports programming of any kind. Apart from that, it's a good "best of" package at a low price.
Most of the channels offered can be authenticated in the stand-alone apps. I successfully authenticated on Roku and Apple TV. There were some issues trying to authenticate on Amazon Fire apps.
Philo is currently only available on Roku and mobile devices, as well as on a computer running Chrome, Safari, Firefox, or Microsoft Edge. That means that despite being able to authenticate the individual apps against Philo on Apple TV, Philo itself isn't available on that device.
They offer a seven-day free trial. We tried it, and decided to continue using it for at least another month. You may want to give it a try.