Having just finished a "hobby size" setup of Rook-Ceph on 3 n100 mini pcs, with every service to fit in a couple hundred MB of ram (one service needs up to 3Gb when starting, but then runs around 250MB) I'd ask why not ceph?
At work I'm typically a consumer of such services from large cloud providers. I read in few places how "difficult" it is, how you need "4GB minimum RAM for most services" and how "friends do not let friends run Ceph below 10Gb".
But this setup runs on a non dedicated 2.5Gb interface (there is VLAN segmentation and careful QoSing).
My benchmarks show I'm primarily network latency and bandwidth limited. By the very definition you can't get better than that.
There were many factors why I chose Ceph and not Garage, Seaweed or MinIo. (One of the biggest is that ceph does 2 birds with one stone for me - block and object).
Ceph is far higher on RAM usage and complexity. Yeah if you need block storage in addition it's a good choice, but for anything smaller than half a rack of devices it's kinda overkill
Also from our experience the docs outright lie about ceph's OSD memory usage and we've seen double or more than what docs claim (8-10GB instead of 4)