After a sensitive cocoa farmer from Ecuador is getting engaged with a rich entrepreneur girl, he must decide between the marriage to rescue his bankrupt family plantation or his true love who lives far away in Germany.

If it is "true love" i would rather see him struggle bankruptcy

The location specific details seem unrelated to the plot. You could write this story in the American mid west, China or Greece the plot still works. Poor farmer about to loose it all gets engaged to a rich woman to save his family business but falls in love with another woman before the wedding.

I think the concept of "reader letter" is too obscure and possibly unclear, the details of how they met may not be important what is important is the love triangle your plot is centered on.

The choice between marrying for money or marrying for love has been done many times both in comedy and drama, perhaps add in a description of the stakes at hand. However high and original the stakes are, will help make this concept distinct from many others.

How did they meet?if she's in?Germany and he's in Ecuador?? On Tinder???While she was visiting Ecuador?

For that matter?how did he, living in Ecuador, ?meet and get engaged?to an?American?