Introducing BigLittle Micro Finance Ltd.

For our last use case scenario we introduce BigLittle Micro Finance Ltd. This is a fictitious online company that links borrowers with lenders. Although technically a bank, BigLittle Micro Finance Ltd. specializes in micro loans: loan amounts that do not exceed 20,000 USD. Accordingly, in order to make money, the company needs to have a much larger customer base than an ordinary commercial bank would. Borrowers could be either individuals or small businesses. Lenders, likewise, can be individuals or small businesses (or even small banks). 

For the purposes of this scenario, assume the website is based on Django for reasons stated in Chapter 7, Advanced MongoDB Database Design, in the section entitled Using MongoDB with Django. Unlike the previous scenario (for example, Book Someplace Inc.), however, in the remaining chapters of this book, we do not show full Django code. Rather we provide the pertinent code examples and leave it to you...