8 miles from Dtn San Diego is 92111, 92120, 92115, 92114, 91910 (north), 92139 and 92107/92118 (Cays [both coastal and NOT comparable]). San Carlos is 10-12 mi from Dtn and La Mesa is 11.5 to 15 miles from Dtn.
Your comparison sold comps are in the zips shown above.
The problem with Austin is that it’s primarily flat, and, even if you have a “view” of gently rolling field, it’s NOTHING like the views in SD from the above primarily “working-class zips” located 8 mi from Dtn SD. It’s also very hot and humid, and has snakes, giant grasshoppers, chiggers, and a LOT of crickets in that tall wild grass, which is everywhere. The crickets can be DEAFENING at night. A cheaper tract home in TX might have large flat backyard, but it will usually back into another backyard. More than half the backyards in SD County do NOT directly back into another property because the terrain is not completely flat.
Doooh, I think you’re comparing apples to oranges. If you want to try living there, go rent for awhile and see if you like it. A 2 bdrm apt there is probably in the $350 – $600 mo range.
Edit: I forgot to mention that, depending on the county, property taxes average about 2.75% of assessed value in TX.