At $5 a gallon, $10k will buy 2,000 gallons of gas. If your commute is 30 km (20 miles) roundtrip, you'll use about 3/4 gallon per day. Assuming the carport doesn't take time off due to snow load, cloudy weather, etc. you're looking at 2600 days, or about 8 years of a 5 day a week commute to...