I got the owner’s permission to rent through Airbnb, essentially the Airbnb Arbitrage model now.

that's not reality in the building world.. things cant come to a stop while he gets your permission unless you don't mind the project dragging on.. there are always field changes.. 

We secured permission from Seller to begin re-configuration work prior to closing.

Buy or make a no smoking sign that says “ No smoking within 25 feet of the building “ and place it outside or You buy the material and give permission to make a small patio away from the house where he can enjoy smoking his joints or build one yourself and mark it “ smoking shelter”.

By "cutting them slack" you give them permission for your rent money to be used for other expenses and/or pleasures.Here's a little take-away I learned from a similar experience early on: "Always base your actions on what a tenant DOES; never on what a tenant SAYS they will do."

IF somebody else pulls your credit with permission if its within a certain time frame it should not effect your credit.

Under his guidance had 2 single guys behind on the rent because one of them was a drug addict, had his roommate request permission in writing to vacate because we had a lease the states it's rented "singularly and severally", so one renter can act behalf of the other, return the keys, and then lock out the other tenant.

Because my lease said I had to get permission first. 

Caveat: Make sure tenants know they cannot install satellite dish on roof without permission.

The new person should always be screened, approved, and added to the lease before occupying the property.She moved someone in without permission and I suspect he's a boyfriend, not just a buddy.