[brudgers]

Using the file system for storage, the "index" could be code, e.g. a Python dictionary, a Clojure hash, or JavaScript Object. This might simplify building a first iteration product and avoid the technical and cognitive overhead of learning a properly implementing an unfamiliar DBMS.

[ninadmhatre]

Thanks for the reply and tips, but my question was on more of choosing self or managed hosting?

[Annatar]

Always choose self hosting. Not only will you learn a lot about operations and proper hardware design, servicing, and redundancy, but you will have maximum control.