Rentometer.com tops out in the 95030 downtown area at about $9,000 for 6 bedrooms, albeit it assumes an apartment. A house for $1.8Million at 30% down would have payments of about $9,000 for loans at 6% and all taxes and insurance. At $2.5 Million at 30% down, payments would be $12,692/month. At 40% down, of course payments would be lower. In all cases, the after tax payments would be considerably lower due to the mortgage interest deduction.
So even though you might not get the rent, you can see that selling it should be an option. Maybe your home is marketable at >$5,000,000? It all depends on the size, number of bedrooms, presence of a Nanny's quarters or in-laws quarters, amenities, acreage, location, etc. Very important, it depends on the marketing skill and reach of the realtor. In that price range and area, your realtor should be TRC certified, which means he can use the international system through ICREA for exchanging funds with overseas buyers. He should know how to use ICREA international property MLS, and depending on whether your property has any commercial use, such as an orchard, open land, etc. the land and commercial MLS sites as well.
Should you decide you are interested in selling it or renting it, please feel free to give me a call. I would love to be interviewed to be your agent.