20 HP ('85) manual to electric conversion

[bugdoctor]

I am very interested in converting my manual 20 HP to an electric start. I am wondering what it will take and where I can acquire the parts, especially used ones as it is not a new motor and not very practical to start with new parts, etc. however, I also would like to know what the new parts would cost , perhaps it is managable financially ? And, what kind of a project is it ? Jim