I'd look for a good brand and spend some time looking at reviews from a big box store. 

@Yael DoronHi - I don't invest in Phoenix but was just curious if you already own real estate and are looking to expand into Phoenix, or are brand new.

Kitchen RenovationScope of Work:Replace all cabinets with high-end custom cabinetryInstall quartz countertopsUpgrade to stainless steel appliances (high-end brands like Thermador or Bosch)Add a large kitchen island with additional seatingInstall new tile backsplashUpdate lighting fixtures with modern pendantsRefinish or replace flooringEstimated Cost: $50,0002.

Connecting with local GC groups in your area will help you connect with subcontractors, find out tips and tricks of the trade in your local area (since all areas and their real estate differ slightly).Also, have you considered the motivation behind building a brand-new duplex versus finding one on the market?

Mobile Homes: Last Week Tonight with John Oliver (HBO)Some educational video from John Oliver.  

Have a big database, sellers who look up my brand/appeal.

You'll also continue to be building your brand, your network, your experience, etc.

You are complaining after four months of trying in a brand new business that you didn't know anything about?

Being a brand new unit you have rehabbed you might have to get her out rather than potentially ruin the whole unit by an act of her negligence.

Plus I recently got a brand new calculator, wanted to see what out of state investors though the most important aspects of deciding between to similar rates cap rates in 2 varied size apartment.