If it's only the pricing of the SASS backend which is holding you back because you wouldn't get enough benefit from seeing and searching all your stacks in one

If it's only the pricing of the SASS backend which is holding you back because you wouldn't get enough benefit from seeing and searching all your stacks in one place, then just use the free backends. E.g. point it at an s3 bucket and it'll probably not even register on your cloud bill. I personally used the free AWS S3 and Azure Storage backends for years in a large enterprise with great success (mainly due to avoiding internal procurement issues).