Yup, nothing will match the redundancy and reliability of S3. If you use Minio and have hard drive issue, you now need to restore. If you really want to cut down on S3 cost some mor then you might want to use Wasabi or Backblaze with Minio as the S3 layer in front. If you're profitable tho, the peace of mind of S3 is worth it than trying to save another $100.