DVC doesn't get free dining because they are getting a "deal" from disney already they are not going to give them another one disney doesn't do that. We are staying for 6 days 5 nights. I believe lodging was over 1500. I have friends that own DVC as well and they go at least once a year sometimes three. They own at BLT and sometimes can't even get in there so they have to stay elsewhere.According to a friend of mine who owns DVC, there is never availability at other resorts. So they have to remain at their home resort. On the other hand Disney has DVC rentals available at all DVC properties, if you pay for it. Also, if you own DVC free dining is not available to you. You are paying $5000 for your trip, but you don't mention length of stay and you're including dining and airfare in your total cost. But what is the actual price of your lodging? I think it would be more accurate to multiply your lodging by 50 years and then compare it with DVC.
Now back to your first statement if disney adds more DVC to resorts than more availability will open up. That also means disney will sell more DVC too.