Allears.net has good rate for swan/dolphin for Jan 6, 7 8 - $159. Special for the marathon.
We stayed at BWI last year and are staying there again, just enjoy the location and resort. We did not plan on being at the "resort" as much as we were but beautiful, warm weather had us at the pool several days of our trip last year. It was hot running last year but the weather was just delightful for our stay at WDW.
You can not walk to the start of the race from any of the EPCOT resorts but if you have a park ticket you can walk back thru EPCOT after you finish. (you really can't walk to the start from any of the resorts)
Also, just another word of caution that I wish I would have known last year--if you and your daughter are planning on cheering each other on for the races, plan your cheering spots wisely. My family got stuck in traffic and also stuck on Disney buses and we did not meet up with them until mile 24 of the marathon. (in front of the Yacht Club) Here are just a few pointers--if you want more info let me know.
--it is dark at the start and not a good place to watch
--MK is CRAZY!!! Trying to get there is a nightmare. My guess is the only safe way is the monorail.
--Ticket and Transportation Center was a popular spot for cheering but might be tricky getting to/from. I wonder if so many people were there bcs they didn't get into MK?
--the finish has bleachers for people to sit on--didn't look very exciting to me! One of the highlights for me was running thru the arches at EPCOT w/ cast members waving flags of the different countries as you ran thru. This would be an awesome place to cheer. I think anywhere along the route from MGM to the finish is a pretty good spot to cheer for the full marathon. The half marathon runs thru EPCOT for the last mile so anywhere inside the park would be a great spot. Of course, you would have to use a ticket to get in to the park.
--outside of the Polynesian also seemed like a good spot to cheer. I don't know how easy it would be to get there, take the resort monorail and get off there? Walk from Ticket and Transportation center? Seems like there were people cheering in front of all the monorail resorts.
--I remember people being parked in the middle of World Drive and cheering there as well. don't know if that is "legal."
Last year we went w/ the "disney" suggested spots and we will NEVER do that again! It was very disappointing --another thing I will do differently is I will have a cell phone w/ me this year. Last year I borrowed another runners phone

Thankfully, I might add.
Hope this helps--just be prepared, I think being a spectator is actually worse than running.
