I created a module to allow you to display (and upload) images from AWS S3.
you can read more about the features on the github repo but in short the module has your standard affair when it comes to displaying images along with some scripts to both deploy aws resources and allow you to upload photos to the s3 bucket from the pi.
There are a couple quirks i am still working on ironing out but thought i would share.
the aws cost for 10gb of photos stored on the free tier should be about 30 cents monthly if you follow the recommended settings, and <4.5GB should stay within the free tier entirely.