Ninkilim: Development

How much does it cost to run a Ninkilim server?

A Nanode from https://linode.com/ is available for as little as 5 USD
per month which may be enough depending on the size of your X (Twitter)
archive and the popularity of your site.

You may already have a domain, there are some domains available for free
and even .com domain are available for about 15 USD per year.

SSL certificates can be obtained from https://letsencrypt.org/ for free.