Where the problem starts is when absentee owners don’t want to live with or interact with the guests and keep them quiet at night respectful of the neighborhood and not causing a scene.That is why Anaheim is kicking them to the curb,because of the all night parties and the coming home in the middle of the night as noisy as possible waking everyone up.

If it's in a neighborhood where this is not typical it can work against you if the Seller is leaning on the unpermitted addition to boost the square footage and or bedroom/bathroom count. 

Not just curb appeal but long term when it comes to resale.

Think it extends beyond the app - most of the website could use a significant boost. 

Plumbers have come over to fix the leak but they can't shut off the water because the leak is before the main valve and the curb trap has shifted so they can't shut it off from the street.

Relatively cheap but visually impactful upgrades can really boost appeal and rent.

Appraisers will adjust market values based on concessions, hold backs, and ancillary methods of boosting the end sales price so that they derive a "market value."

Contactless (online) payments is a big deal given the current state of things during C19, especially with the right platform that allows your tenants more options (ie. debit/credit card option, ACH payments, or even expedited payment processing, along with rent/payment due date reminders, and the ability to report positive payments to TransUnion in order to give your tenants' credit scores a boost; this acts as an added incentive for them in the long run as well).

Yes, curb appeal IS important. 

Hubby can't stand weeds and it's good for curb appeal.