Reoccuring costs

 Many times bushes get hedge trimmed because their mature size and where they get planted were not taken into consideration.  Some landscapers might choose plants and plant them in areas knowing they need to get hedge trimmed so they can ensure a maintenance contract.  On Time Landscaping does not do weekly maintenance at residential properties so we have no incentive to install plants that will need to be hedge trimmed.    

 …the value of… a landscape improvement increases over time since the growth and maturity of trees and shrubs enhance aesthetic appeal. Source

 Pat Vredevoogd Combs, a past president of the National Association of Realtors said that “Well-landscaped yards with mature trees and bushes that provide privacy not only fetch higher prices -- they sell more quickly than houses with little or no landscaping…”   Source 

 said that “If you are considering selling, good landscape design can add up to 20% of value to your home.” Bob Villa 

 Healthy, mature trees add an average of 10% to a property’s value. U.S. Department of Agriculture  

 Strategically placed trees save up to 56 % on annual air-conditioning costs. U.S. Forest Service 

 …the net cooling effect of a young healthy tree is equivalent to ten room-size air conditioners operating 20 hours a day. U.S. Department of Agriculture  

Per the state of Nevada a contractors license is required to install rock, plant trees, shrubs, sod.  Source 

The Residential Recovery Fund may cover up to $35,000 in damages if a property owner is harmed by failure of a properly licensed contractor to properly perform qualified services.  Source 

 A contract with an unclicensed / not properly licensed "contractor" is not valid... Source  

 You can check who has a contractors license by contacting the Nevada Contractors Board.  

 The state of Nevada requires a license to spray for weed control for the company and each individual who is doing the spraying.  It is a specific license and is not included in any other license.  
The Nevada Department of Agriculture has a PDF on there website about it.