Looking at a couple of references for installing VirtualBox:-
www.freebsd.org
www.ostechnix.com
both suggest building from ports, but I'd prefer to install a pkg, since building invariably takes a long time and is error prone.
Is there any reason not to install a pkg?
Are the rest of the instructions in The Handbook still accurate? Anything in particular to note? I'm hoping to run Windows 7 under
VirtualBox...
Chapter 24. Virtualization
Virtualization software allows multiple operating systems to run simultaneously on the same computer

How to Install Oracle VirtualBox in FreeBSD - OSTechNix
This brief tutorial describes about how to Install Oracle VirtualBox in FreeBSD 10.3 MATE desktop edition.

both suggest building from ports, but I'd prefer to install a pkg, since building invariably takes a long time and is error prone.
Is there any reason not to install a pkg?
Are the rest of the instructions in The Handbook still accurate? Anything in particular to note? I'm hoping to run Windows 7 under
VirtualBox...