Paying cash for weekends is very expensive, and the member 25% discount won't be available 11 months in advance. They offer it to sell unsold rooms, so you have to check more close to your arrival date.
The walk from BCV to the monorail is very long. You have to walk to Epcot, then walk all the way through the park and exit it, then go up to the monorail. That's why there are buses to the MK from BCV - it's much faster. If you do the monorail to get to MK, better allow over an hour - plus remember you'll have to transfer at the TTC with the hordes of non-resort guests coming in from offsite.