Everything is going up in price right now! You would probably be ok budget-wise on one of the new build neighbourhoods (Bli Bli, Perigian Springs or possibly Harmony - although I've heard Harmony is a bit cramped). Bli Bli seems to have a nice community feel and good facilities and would probably be my choice, but I don't really knwo the others.
If you want something non-estate, Coolum and the whole surrounding area would be my pick (although check out flight path of new airport if you look at Mt Coolum - mind you it's only a few small aircraft a day). There are a few towns north of Noosa (Cooroy or Pomona) which would be lovely if you want a smaller rural town feel (not sure on times to the beach).
These areas cover many schools. I don't think there are any terrible schools, but I know a few people are not keen on Sunshine Beach High. Coolum High used to not have a great reputation, but I hear good things about it now.
Also I heard that getting a rental is really tough at the moment, so be prepared for that!
