Kris, LM is not considered “outlying.” It is a very close-in suburb directly adjacent to SD. It is only 13 miles from Balboa Park.
Those three North County cities you mentioned are considered “outlying.” Other Piggs on this board are much more knowledgeable than I on what type of “fixer” might be available in your price range in those cities, if actually listed.
You never mentioned here the size, style or age of dwelling you are looking to buy in SD for $450K.