Joe, do you think that adults provide more wear and tear than kids and pets, or is it  close living situations with more adults?

In the income section however, you will first determine the PGI for the subject based on its income sources (Rents, storage and parking fees, laundry income, pet rent, etc).

Think of all the things that could go wrong and see if the lease addresses them: unauthorized pets or tenants, early termination, security deposit, lease violations, late rent, eviction, lawn maintenance, parking, etc.5.

Tons of fees like extra for pets, extra for guests, extra for charging etc and stipulations like no fireplace use, no parties, no whatever.

A thread like this will invite some person to give a boiler plate response like "Your property management should make you more money" (which they're probably parroting from some podcast they just listened to).There are a minority of stellar property managers, but the vast majority are either 'meh' or major sources of incompetence and liability. 

On top of that, they were spending lavishly on vacations, new cars, tons of pets (which are expensive), etc.

Think of all the things that could go wrong and see if the lease addresses them: unauthorized pets or tenants, early termination, security deposit, lease violations, late rent, eviction, lawn maintenance, parking, etc.5.

Consider if you want to pick up some niche guests by allowing animals or making a cabin pet friendly or adding an indoor pool.  

What is the standard for Pet Deposits in the industry?

This was not disclosed to me and we do not typically allow any pets.