First point I should note here is that an EV is not for your fancy long distance trips. An EV is suitable for your day to day commuting within 50 or 60 miles. You can save a lot of money that you spend on unpredictable gasoline prices by owning and operating an EV.
How to get an EV? There are many ways to buy an EV. You can either buy a brand new one made by companies like Nissan (Ex: Nissan Leaf), or a used EV from used car dealers, or a converted EV. A converted EV is nothing but a gasoline car converted to an EV by hobbyists or small entrepreneurs. They remove the fuel tank, engine and other components from a gasoline car and then install an electric drive mechanism with old battery technology. You can get a converted EV from $5000 and its cost won't go higher than $20000 in normal cases.
How much money you can save by using an EV? Well, let's take a look at this metric. Let's assume you drive an average 1250 miles every month and your vehicles range is 20 miles per gallon. If we calculate costs at $4.25/gallon, then the cost incurred is $265 per month if you use a gasoline car to cover 1250 miles. On the other hand, consider an EV that gives you 5 miles/Kwh. If we approximate your electricity rates as 7 cents/Kwh - then for 1250 miles you spend only $17.50! A saving of $247.50!
Note: Electricity rates differ with time. Here I used average off peak rates. Please take care to recalculate above figures with rates in your city to get an idea of how much savings you can make.
What about maintenance costs? In a word - 'very low' compared to a gasoline car. A petrol/diesel engine and its associated components require frequent maintenance like oil changing, lubricant changing etc etc. An electric motor is free of such frequent maintenances. But battery life is something that will cost you money in an EV. If your EV uses an old battery technology like lead-acid then you may expect a battery pack replacement per 20,000 miles. The cost will be around $800+ but it may vary with time. Still it costs you only 5.5 cents per mile.
If you use a modern battery technology in your car say, Li-Ion or Nanotech battery pack, it may last as long as 250,000 miles. Some companies even promise a life time warranty for your EV battery. Note: Initial cost will be high when you use a modern technology battery, but it will prove economical in the long run.
The final virtue of an EV is it keeps our environment clean (better than a gasoline vehicle at least). In the present scenario, where human beings fight global warming, an EV is significant.