Help with loop & user input

[rdDrp]

This is Not homework assignment. I am beginner to programing itself, just started with python.

What i want to achieve is this:

• Ask a question to user.
  
• Get answer to above from user (numbers only)
  
• Based on above answer, create something:
  what it that something should be?
  • a list
    
  • a variable
    
  • a dictionary
    
• When something is created, that something will be getting user input till it reaches the value given at the first input ( i.e. at step which is marked in bold)
  

Example:

• A. How many cars, you have given on rent?
  
• B. This is user input, which only should accept numbers.
  > Ans/Value Input by user : 5   
  [# So the user has given 5 cars on rent.]
  
• C. Now I want the user to input rental income of each of those 5 cars.
  
  > incomeFromCarOne = 1200   
> incomeFromCarTwo = 2450 etc...    
> till incomeFromCarFive is reached. 
  
• D. If user input value is nil/zero or blank, the script should stop.
  [# What i mean by that is, script should go to next line of code which is independent of above.]
  

I could post code but it's basically getting input from user at B and that's it, i can not get past the first input.


System Info:
1. Win 7
2. Python 3.5