Yiks! I have a POR map right here on my desk (duh!) - I corrected my 1st post, but our building was actually #25, not #27. From there it was 5 minutes to the pool, and about 8 minutes to the food court.
Will you have stroller(s) for the 2 and 5 year olds?
Are you going to be going back and forth from the parks, or just hit them once a day? I'm not sure how often you'll be riding the buses versus spending at the resort. I guess for me personally, I'd rather be close to a bus stop where there's a good chance of getting a seat, especially with children that age. Hopefully, though, someone would give up their seat for the 2 youngest. Not sure what building to recommend for you, but hope you enjoy POR!