I'm in the process of setting up a FreeBSD 10 server with just some services on a KVM server:
NGINX webserver w PHP-FPM
2 domains, 3 subdomains
3 Email addresses
MySQL (or other) database server if needed The server will only be administered by me. One SSH account with sudo access and later a second one with restrictions, mainly for SFTP operations.
I set everything up with ZFS (encrypted root) and am now thinking about whether I should / need to use jails or not.
I'm also unsure if it would make more sense to encrypt the jails and not the root volume although I don't have any idea how to do that.
As I read the security gain of jails can be debated and I'm unsure whether I gain anything with the added complexity of the whole system.