what I have noticed in Golden Hill and Bankers Hill (near downtown SD), is foreign buyers of apt building (by foreign I mean investors from outside SD county, like from the bay area, the east coast and even “china”), basically give notice to existing tenants just after the close
the reason being, with GRM in the 15 to 18 range, existing rents don’t cover the mortgage (so the new buyers kick everyone out and jack up the rents)
