I have friends that studied at both flyings schools.
Oregon is not cheap unfortunately (not as expensive as California) and from a 'minimising cost' point of view, Florida is the better option.
Weatherwise, tdracer said it best (#8) so don't worry about having lessons canceled on many occasions. From weather experience (i.e. cold weather experience, low IFR 'ceilings'), Oregon is where you'll obtain that experience. Florida is known for it's thunderstorms in the summer and I cannot recall (at the moment) of a snowflake on record.
Wish you the best in whatever you decide.