I mean i even had my guys ready to go in the house to do the lawn and clean up a bit.

But, what if there is more clean-up and repairs needed than you anticipated and the unit has to stay vacant for a full month? 

Best of luck to you and good to see other people from Fargo, ND gracing this site.

However, if they wanted to justify it, I'm sure the justification is that renters cause more problems than owners; renters tend to live then shorter periods of time and there are expenses when someone moves in/out such as extra trash pick-ups, programming them into an entry system, cleaning costs as the move in/out can be messy around the building, light damage to the building, scheduling of the freight elevator, cost of providing additional notices as now the tenant and owner need to receive copies, etc.

If you've been reading up on wholesaling, then you know you can use several strategies to find deals such as direct mail, bandit signs, driving for dollars or searching sites online like For Sale By Owner or Zillow.  

I'm building a duplex and using a lower cost builder who doesn't do any of the site work. 

Hire a great cleaning team! 

There's a big difference between reading books, listening to podcasts repeatedly, asking for advice on this site where the responders don't have a truly vested interest and a mentor that you're paying that has an absolute interest in your success.  

If rotted, they can also replace window sill/framing on site, etc.

You might just find that both of the stormwater drains just need a good clean (sort of like when your bathroom drain gets clocked with all that sticky, guey hair that needs to be pulled out from time to time).