Yeah most all the purchased multi-year certificates are actually just subscriptions to multi-year renewals. There's a reason that most people are using Let's Encrypt instead though, because unless you need to sign an application, or use it in a firewall with deep packet inspection, or have higher security on the certificate, then going free with automatic renewals is actually better.

One suggestion would be to run a server with a built-in ACME client like Caddy. As long as you have a DNS A record pointing to your server, it can automatically answer the HTTP challenge and issue the certificate and automatically renew it without any further maintenance.