This Saas toolkit has a lot to offer. It takes away many of the annoying boilerplate jobs so you can focus on what makes your SaaS unique.
If you factor in the time it takes to make all of the features into something like Laravel Jetstream this product more than makes sense for the price.
Streamline takes all the pain out of setting up a new SaaS application and allows you to build your app instead of having to build all the boilerplate for payments and subscriptions.