I think the fact that people have to enter their ID and a credit card really decreases the look-loos and only people who are serious will come in, which is fine with me.

Can't I just decrease my expenses?"

I have decreased my monthly after doing it for more than a year because of the hospitals have lowered incentives for pay and so I needed to adapt to what folks could afford. - Cleaning fees should be heavily reduced. 

Because investing in real estate in most cases when done long term even negative cash flow can turn into tax deductions that actually make it NOT negative and over time equity increases and rates decrease.

If vacancy is low and decreasing and the number of building permits pulled are moderate and slightly increasing, it should mean that demand for housing is going up in that market and supply is growing but not yet saturated.To expand on this, we added absorption rate and affordability.

It's difficult to come up with an ROI based on the decrease in rentals. 

The population of Detroit has been decreasing since 1950.

Negative cash flow can turn into tax deductions & equity driven as rates decrease, properties & rental values increase.

Your $/sf decreases as your sf increases.

People are moving out of those areas so there is an increase in supply and decrease in demand2.