@Kole Kingslien, each property is listed separately on the Schedule E, so I would highly recommend maintaining separate records for each property.

We have a clause in our leases that landscape is extra $x.xx per month or the tenant can agree to maintain.

I like your optimism! 

We don't own any condos or townhomes in our portfolio, but having personally lived in both, they tend to attract no-maintenance types who either have busy professional/personal lives, not enough money to afford to live in a standalone home in the area, looking for included amenities (pools, tennis courts, etc), or don't want/don't know how to fix & maintain anything. 

There are cons to the condo (HOA and cost as mentioned above), but I find that it is more convenient to manage remotely because all of the amenities are maintained by someone else.

I'm trying to help out my agent that is selling my 4/2.5/2 in a nice neighborhood in Austin, TX (for $639k) I'm looking for optimal keywords, demographics, etc. to use for the ad.

Our house has been well maintained and not a lot of work needed to move in renters. 

Do property managers play a large role in obtaining or maintaining certification?

If your buying power falls, so does your ability to maintain the same standard of living.Below is another example where Property B starts with a higher initial return, but because rents do not keep pace with inflation, buying power declines below property A. 

They are responsible for maintaining the black water drain.