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!