I believe you can.
You could purchase a $400-500K single family detached home in most San Diego County neighborhoods.
Neighborhoods that you could invest in a condos for around $120K or less 2 bedroom 1 bath minimum would be the following:
Alpine, Chula Vista, Imperial Beach, Lemon Grove, Spring Valley, El Cajon, Escondido, Lakeside, Oceanside, Santee, Vista, College area, and periodically in the San Carlos, Del Cerro area.
Hope that helps you and good luck!
Pacific Sotheby's International Realty