There is definitely market potential, as the current approach is very manual, errorprone and not in time and our solution will save the customer lot's of time (which means money). I would say it's more complicated to sell a car to a customer coming to your store, than selling this.

As for the discrepancy in salaries, I earned twice as much as him when I was working. If I would have started at the same time he has started, I would be able to invest more than twice as much I'm investing now without having less on my bank account now. This must be worth something.