You can get 6 months 0% interest with the purchase of DVC on Disney Visa and you get the reward points,
DVC will allow you to break payments up to 90 days..for example 1/3 at 30 days, 1/3 at 60 and 1/3 at 90 days and then you get your 6 months additional from each one, basically getting 9 months to get it paid off,
I did this but only over 30 days so I had 7 months to get it paid! It was a nice feature as I was selling a contract at the same time as buying RIV so this just bridged the gap,
However, i do not know how it works if you take out an actual DVC loan with the Disney Visa and if you can use it to pay on that.