Greetings, I am currently working with a real estate firm to develop their application ( Mobile & laptop) which will acquire proprietary images and other details for the sales representative in their Salesforce listing system. We wish to then generate official quotes for customers with which we will display them varying pricing system.

Example to give you better idea: Example to give you a better idea. http://www.sfdcpoint.com/salesforce/visualforce-page-render-pdf/

But how to download PDF?

Zocuments has the ability to run a Salesforce Report and subsequently generate a document(s) from the report using a Salesforce OAuth token. Unfortunately at the time Zocuments is not a native Salesforce AppExchange application and will only work with Salesforce Reports to generate documents from the Zocuments Dashboard.

Please see our blog post on how to do this: https://blog.zocuments.com/salesforce-document-generation/