MinIO has moved away from having a free community fork, and I think it's base cost is close to $100k a year. I've been using Garage and been happy, but as a single dev and orders of magnitude smaller than the OP, so there are certainly edge cases I'm missing to compare the two.
I'm a fellow new Garage user. I have had a great time so far - but I also don't need much. My use case is to share data analysis results with a small team. I wanted something simple to manage that can provide an s3 like interface to work with off the shelf data analysis tools.