Dave I have about 20lbs of rib eyes that were $4.99 in the freezer, some of them will be ground...still cheaper than the $13.99/lb burgers I was getting at the butcher.Man I would have a tough time grinding those... Happy to help you out and grill them so you don't have to grind them.
as for fat content...I have trimmed a chuck roast and briskets pretty lean before grinding and never felt there wasn't enough fat. Never added fat either. my $0.02 on that.
What is WD?