My dad has been a car dealer for the last 25 years or so. He now works for himself selling, for the most part, used cars. I'm interested in the business and how it all works and I'm attempting to add a bit more structure to my dads business by creating a DMS for sole traders. In an attempt to do this, I've tried to make a model of how the process of selling used cars to make a profit works.
It would be great if you could take a look at it and tell me were I've got things wrong and if there's anything I've neglected to cover.
You can view it
here.
Just post in this thread the corrections and additions you would make.