I saw this

"If you have a vacation home that’s mostly reserved for personal use but rented out for up to 14 days a year, you won’t have to pay taxes on the rental income. Some expenses are deductible, though the personal use of the home limits deductions."

So, if I rent someone's vacay home for 14 days because I brought clients, team building, etc, they don't pay income taxes and I can write it off as a biz expense?

Of course you can write it off.
Why do you care how they file their taxes?
Are you planning on renting your own home to yourself?

Sounds like bullshit to me.  Income is income, be it more or less than 14 days.

Is it bullshit because you don't agree with it, or because you think the OP is incorrect in his understanding of the law?

OP is correct.  Rental income on 14 days or less is tax free.

Guess how many people in Augusta take two weeks off during the Master's, rent their home out for big bucks, and enjoy all that tax-free income?

Sweet.

https://www.irs.gov/taxtopics/tc415.html

Here you go!