DVC is right for you if you plan to go to WDW or DL every 12 to 18 months and you want top-notch accommodations that provide access to kitchens, washer/dryers, and OPTIONAL perks. If you want to take the chance and trade those points into the various Disney collections/tours/cruises, then you need to buy direct from Disney. If trading out is not an interest to you, then buying resale through TTS or other reseller would work.
Two cautions: once you buy DVC, you measure all hotels/resorts against WDW. Second, you can become obsessed by either trying to figure out how to maximize your points OR planning your next trip.
Hope this helps.