Money is important factor but I know many people that were accepted with wage of 10-13$/h. 
There are many factors and the most important are: Income, Family, Your Status (single/married), English proficiency, Work Experience, Criminal Background.
Most common refusals are:
1) lack of experience;
2) missing documents or not properly filled application;
	
		
			
		
		
	
				
			There are many factors and the most important are: Income, Family, Your Status (single/married), English proficiency, Work Experience, Criminal Background.
Most common refusals are:
1) lack of experience;
2) missing documents or not properly filled application;
 
	
 
	 
 
		