As someone who made the move from OC to SD 6-7 years ago, I do agree you get a lot more house for the money here in SD.
IT here may not be as strong as you think. You got Qualcomm but that’s pretty much it. Sony, HP, Nokia are located in the I-15/56 area, but they have all been struggling and folks I know that work there are not a happy bunch. What is strong is defense, also along that area and Poway. We have a bunch of companies involved in drones development, they are doing great. Biotech companies along the I-5/la jolla area are doing well.
In regard to housing stock, the new housing are concentrated in Otay Ranch, East Lake, 56 corridor, and San Marcos/Carlsbad. Every region of SD is unique in its own way. Since you are from OC, let me know which OC city you like the best, I’ll do my best to give you the SD equivalent.