If the author is using a micro instance in the first year, there is no charge [0]. Also, the author only needs to start the instance when he needs it, so the costs would be minimal.
Furthermore, only transfer out of AWS is billed; there's no cost to upload, which is what I imagine would be the bulk of the work.
Furthermore, only transfer out of AWS is billed; there's no cost to upload, which is what I imagine would be the bulk of the work.
[0] https://aws.amazon.com/free/