If the payment withheld was so much that they couldn't afford rent anymore (or it would be tough) then you run the risk of having them not be able to pay you.

Buy the best you can afford do not get sucked into the highest returns those are generally the most risky and the returns are only on paper you never actually realize them.. buy a nice home at the top of the range not the bottom and you will be much better off... property management will make or break the investment so make sure you good with that.

A conglomerate that buys 10,000 units at a time can afford to make $50/month/door because of the multiplier effect, but becomes that much more exposed if there is any kind of generalized downturn. 

I would ask, how many lots can you afford to pay the taxes on each year before you run out of disposable income?

I am trying to be super carful with these deals and cant really afford to pay out for an appraisal and then the property fall short of the loan criteria which intern leaves me in the hole and no loan.  

Tommorow I am going to visit my first commercial property 4 apartments, 1 retail space and additional revenue from billboards and a future cell tower (I need to get details on this) I am not sure I want a cell tower on my building from a safety and health standpoint?

Fundamentally, to the extent of my knowledge, the Bay will still thrive and grow for a long time to come.But the question of: "Is the cost of living in the Bay so high compared to the rest of the country (maybe historically, or just the affordability index) that it is now a very attractive option for a ton of people to start moving elsewhere?  

Professors, military officers, and some foreign business people fit into this category.B Class: Solid working class renters who are on the edge of being able to afford their own home.

How are they affording the rent?

Currently, I live in San Francisco, I am happy with where I live and rent my home, and I cannot afford to purchase a property near to where I live and work.