Source: US Census. The median household income in the US is $50,502. This is some extremely useful data given that it is exploring over 114 million US households. If you want to know how most Americans are living this is a good figure to base your assumptions.
The myth that you have to wait 30 minutes or even an hour until you can swim after eating has been conventional wisdom for some time. The simple fact is, however, that swimming on a full stomach does not significantly impact your ability to swim.
After you shock the water, in your pool, you should wait at least 24 hours, before swimming. It is also very important to check the free chlorine level, after you shock the pool, and before you swim. Make certain that the free chlorine level, is within the acceptable parameters, only then is it safe to swim. It depends on the shock. I use lithium hypochlorite and I can swim after 15 minutes.