Hi @sebasira
For dns cluster you’ll find here a lot of useful informations: Hestia and DNS management?
Basicly, yes, but do not know if the publishing tine gets properly honored - on v-script way of dns cluster, they get synced every 5 minutes.
Yes, if you use a *.domain.tld record as alias, it will request a wildcard certificate for it.
If you plan to install such a setup, please hold us up to date.