Because of San Francisco's rent control, many landlords PREFER housemate situations for exactly the reason that Lynn shuns them: turnover. In San Francisco, turnover is a good thing, as it allows you to keep the rent closer to the market price.
Also, the reality of the rental market is that it's very difficult for single people to afford anything nice here, so it's very common even for professional adults to live together. Additionally, San Francisco has a higher percentage of single people than Dallas. I'd rather rent to adults in a stable, friendly relationship who each earn their own income than a family depending on one income whose children might damage the property.
As far as specific suggestion go, I don't have much to offer. We are limited by law as to how much we can charge for anything that could be perceived as a deposit, and in a hot market, many landlords are already asking the maximum. However, you can offer higher rent or a finder's fee (either of which is essentially a legal bribe, but would be one that operates within market principles).
Also, don't discount the personal connection factor. Like me, many landlords in San Francisco only own one or two rental properties. San Francisco has a large number of 2- to 6-unit Victorians, and many of us live upstairs or downstairs from our tenants. This means that while I do look at the financials, I'm also thinking about who's going to make a good neighbor. Don't discount the importance of making a personal connection. Recognize that San Francisco is a far more liberal city than Chicago or Dallas. If you come across as uptight, unfriendly, or -- God forbid -- litigious, you're going to keep losing out because we San Franciscans have a tendency to apply our personal values to what may seem to outsiders as purely business decisions. That's part of the reason many of here and doing what we do, like being a Realtor or small property landlord. I hope it's something you'll come to appreciate, and in the meantime, at least be aware of it and use it to your advantage.
Disclaimer: This information is purely personal insight from my own experience and is not in any way professional advice. (It's probably better.)
Best of luck to you. Yes, you'll still need that. And feel free to call or email me if you would like to chat.