I consider that “decline of 10%” happening and stagnation, then annual inflation(or cumulative effects of, however you say it), so it (probably) works out in my mind simular to what your saying.
“Assume we are already down 10% over the past 1.5 years for comparable property.”
My house sold for more like 15% less than it did @ the “height” of the market”(that is if it goes through).
Certainly, other places in San Diego are more out of whack with rents, than mine.