My advice would be that you scrap the idea of hoping that you can live off this type of investment, without another source of regular income.
Medium to long term investments like 10 to 20 years should ideally not be touched, and left for the duration. In this time, expect to see a good few dips in your investment - but overall expect to make a good return.
If you can afford it, I would say put aside what you can essentially 'forget' about for 10+ years, and invest in infrastructure via a fund or two.