This month Comodo WildCard certificate is only $148. Secure all domains with one certificate *.yourdomain.extention Wildcard certificate is a public key certificate which can be used with multiple subdomains of a domain. So a single Wildcard SSL Certificate covers any and all of the sub-domains of your main domain. We install purchased at BWA certificates on any domain that is hosted with Business Web Admin. We could held with SSL web site proper setup to avoid mix content. In general for better web security we reccomend wildcard sertificate as the first one and minimum one.