5- It's important to notice that rent fluctuate almost synchronously with interest rates : When there are high so is rent, when there are low so is rent. Housing price tend to lag by a few years as the amount involved are on different scale , same could be said to the psychology and demography components.
Further analysis or charts to do would be :
- rents vs interest rates
- rents vs M3 (debt growth taken by households)
- rents vs housing price
- rents vs income
- rents vs baby boomers (The demographic "tsunami" wave created between 1945-1950), wave that has created shock throughout the economical timescale (that's the one who disrupted the 1990 boom) and the one that are causing issues with mass retirements...
Feel free to provide some charts, links or analysis....