Typically it's someone who doesn't have any other choice, single parent, disabled, government assistance, etc. 

Routine testing for lead is not required in my state. 

You could have an addendum that tenant assumes responsibility for routine maintenance that would cover additional items like landscaping, smoke detectors, air filters etc.

You know the relevance, you know they are a necessary evil, but when you do them enough, muscle memory kicks in and it no longer requires active thinking to get you through the process and you can focus on the content rather than the routine of it.

I figured out at one point what a ten year period of major and minor repairs/systems replacements, a few turnovers of tenants, and normal routine repairs would be.

The comedy routine continues.

Lead may cause a range of health effects, from behavioral problems and learning disabilities to seizures and death.

I don't have any evidence to support this assertion; and would love to be wrong about it.I agree that providing support for parents who choose not to support themselves (I'm not talking about people with disabilities, but people who are lazy and choose not to try to pick themselves up) is wrong, and I don't want my tax money going towards these people.

I make a habit to routinely inspect the house inside and out to make sure there little pet have not gained 50+ pounds all of a sudden, or done any damage.

What happens if the husband makes 5X rent, but the wife is disabled and makes $0 because she can't work.