It's not for the faint of heart, or an easy cup of tea to drink. 

Is it mandatory for a landlord to provide door screens for sliding glass doors of a family room?

Stop hanging out with your deadbeat buddies that spend all day drinking, talking sports, and otherwise wasting away.

I agree that's true but kind of a mute point imo... if you're concerned with the pex leaching chemicals then you should be concerned with the piping that city water travels in before reaching your pex lines and the quality of the city tap water in general.... as well as anything you drink that's bottled and any food that's bagged in plastic even those labelled as food safe which have been shown to leach chemicals.

For anyone who reads this and is contemplating paying for one of those courses, don't drink the Kool-Aid!

While noble, it allows you to not fully maximize your returns of your REI portfolio.What you've achieved is amazing, so drink that in. 

Stop hanging out with your deadbeat buddies that spend all day drinking, talking sports, and otherwise wasting away.

I mean, perhaps they'll trust it more if some expert tells them (I'm afraid they are fixated in me changing glass/window)?

Ping me if you come to Greenville again, happy to get together for some food and drink. 

Not sure if the patio should have a glass cage to double as a mud room or open for barbeque.