I fix this by running a script on a cron job that updates dns records based on my current ip, using cloudfront to only allow known ips through my ufw rules. It doesn't work for 100% uptime, but I've never had an instance where visiting my domain failed.

It may not work if you're running a tor node, depending on how cloudfront deals with them, but it does work for mostly-reliable dns resolution on a non-static, residential isp connection.

Not negating the project, just offering an alternative for people that want a static ip without renting vps/metal and without the isp static upcharge.