Tesla (NASDAQ:TSLA) believes it can deliver 500,000 vehicles per year by 2020 with the combined help of a lower-cost car, or its third-generation vehicle, and a "gigafactory" that produces lithium-ion batteries at unprecedented scale. With just about 22,500 deliveries of its Model S last year and 35,000 planned for this year, half a million seems like a daunting goal. But is the figure really as daunting as it sounds? After all, the value proposition Tesla has fashioned for its electric cars is incredibly compelling -- and much of this value proposition will carry over to the third-gen model the company is planning to launch in 2017.

As Fool contributor Daniel Sparks explains in the video below, there are more reasons to buy a Tesla beyond the fact that it is greener than its clunky gas-powered alternatives. The Tesla value proposition is simply tough for gas-powered cars to compete with. Considering just how compelling a Tesla vehicle would be at $35,000, 500,000 vehicles per year doesn't sound so crazy anymore.

Even more, electric alternatives to Tesla's vehicles would likely benefit the company by accelerating the advent of electric vehicles as a mass-market option. All said, are Tesla's ambitious aspirations really unrealistic?

In the video below, Daniel explores some of the key selling points for the Model S -- many of which the third-gen vehicle may inherit.

If you're interested in getting exclusive, unfiltered access to Motley Fool co-founder and CEO Tom Gardner's personal "Everlasting Portfolio" of stock picks -- a portfolio that's outperformed a stunning 99.6% of similar mutual funds over the past 12 months -- you're in luck. For a limited only, Tom is inviting new members to apply for "early acceptance" into The Motley Fool's crown-jewel service-Motley Fool ONE. If you're accepted, you'll be invited to test-drive Motley Fool ONE with zero risk or obligation for an entire 365 days. Simply click here to apply now... time is running out!

This article represents the opinion of the writer, who may disagree with the “official” recommendation position of a Motley Fool premium advisory service. We’re motley! Questioning an investing thesis -- even one of our own -- helps us all think critically about investing and make decisions that help us become smarter, happier, and richer.