As of 9/12/15 I have made a few updates to the guide.
The qmail port installation is removed so everything is installed via source.
The permissions on servercert.pem have changed.
There is an additional installation of fakeroot that needs to be installed before vpopmail. This is just a new dependency.
As of this writing qmail 2.0 works on both i386 and amd64 on FreeBSD 10.2