I've found a few properties in my area that are "retail priced" but have areas that have been ignored by the seller which could improve cashflow to a worthwhile level; for example, not charging pet rent/pet fee, not charging extra for private, fenced yardage, not charging for laundry in-unit.

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.

I always personally call the HOA or condo management and ask specifically about rental restrictions, pet restrictions, etc., even if the home is currently rented as some may allow rentals but have wait-lists after transfer of property or the current owner may be renting without proper registration or permission.  

5) Do they offer any incentives for owners such as Rent Protection, Damage Assurance, Eviction Assurance, Leasing Guarantees, Pet Guarantees, and Tenant Liability Insurance?

Lots of people enjoy condo living due to the convenience of managing a smaller living space, but being situated in a downtown core.5.) the strata rules can help you - if you don't want smokers, pet owners, short term rentals, hoarders, etc in your rental unit then it might be nice to have these rules in the strata bylaws so that you can refer the tenants to them or blame the reason why on the strata. 

I have a dog myself and, therefore, will have to allow pets in other units as well. 

Failure to follow instructions (using a do not use vendor, allowing pets in a no pet rental, not enforcing lease violations)Failure to fill units aggressively with qualified tenants or filling units with warm bodies not vetted tenantsPet peeve: failure to communicate.

Has anyone found a way to avoid taxing the cleaning fee/pet fee ?

You need to take a look at where they presently live and how it is maintained, if they do or do not have pets, how well they maintain their personal vehicle, confirm drivers licence info matches their application form.

I have a 24-unit apartment complex that has a no-pet policy.