Your comments
This is a very good idea, and will be much more if it's possible thru the web interface like cPanel do.
See website here for example: https://letsencrypt-for-cpanel.com/
Maybe it can be an extension with a one-time fee.
And after that we can just forget about renewing our cert.
Customer support service by UserEcho
Let's see this request: https://screenconnect.userecho.com/topics/238-support-letsencrypt/