After things calm down a tad taking to them is also a good first step. 

By the time I got to his door I had calmed some and all I said was look  I am happy to rip up this lease if you are not happy here but if you are gonna stay I don't want to hear any more about this.

As other's have said, calmly tell him that smoking ANYTHING in doors is a violation of the lease and disruptive to the other tenants.

@Yuki Yu To calm your worries, investigate.

, but if a kid is coming out of punishment in his room, it might be the best time for a cuddle on the couch and a calm talk about mistakes, goodness, forgiveness, and love.  

Sleep on it, talk it over with someone, calm yourself down and then make a intelligent decisions on what's best.#2  Look for business decisions that are best for everyone involved in the outcome. 

There some signs of the market calming down a bit finally, but contractors are still booking weeks out when you find a good one. 

Markets have calmed down, more houses are being listed as we go into Fall and Christmas things will level a bit towards your side.

Currently, I have access and have completed some of the Adventures in Commercial Real Estate Accelerator Program, an extensive real estate financial modeling course, covering topics and modeling such as direct cap, key risk/return metrics, income statements (retail, hotel, office, multifamily, industrial), leases, waterfall models, acquisitions/development models, etc.

You can complicate this with multiple waterfalls and pref returns.