In my experience, your ISP will only give you a new IP address if your modem disconnects for a while. You can easily use the same IP address for over a year. Y

In my experience, your ISP will only give you a new IP address if your modem disconnects for a while. You can easily use the same IP address for over a year. You can also use something like DuckDNS to have a backup in case you are away from home and your IP changes, you can still find your server. You could even theoretically write a script that then checks DuckDNS for your IP and updates the record with your Domain Registrar automatically (assuming they have an API)