Hello SIR,
Take my best wishes for your health and happiness... :) I just have seen the requirements for this project and I want to inform you that I'm highly interested to get the opportunity of working in your project.
For your application my opinion is-
Cloning nationalsolarnetwork or energysage will take less time but for that you need their code and other stuff.
I think creating our own script that communicates with Google Sunroof and displays quote information would be the best possible way to complete this project because if so we can extend or modify this app very easily in future. I can accomplish the project as the way you want it.
Tough I'm new in Freelancer I'm really pretty experienced in developing different types of both small as well as large scale web applications based on-
JAVA ( JAVA EE, MAVEN, MYBATIS, JUNIT, JSP, JAX-RS, JERSEY, RESTful Web Service )
PHP ( CodeIgniter, Laravel, WordPress )
JAVASCRIPT (JQuery, NodeJS, AngularJS, Bower, Grunt, Gulp, ExpressJS, RequireJS )
You are most welcome to TRUST me. I won't let you down, I promise.
And I'm not engaged in any type of job right now. So, I can START today, try to finish developing the application and deliver you as soon as possible.
I'm eagerly waiting for you positive response.
Sincerely
trailblazer100