Sure, for 7K you certainly can buy several nice e-bikes already assembled. I assembled my own bike for less than a thousand dollars, goes ~20mph+/-, for ~25 miles+/-. The individual prices of bikes and/or electric conversion bike kits vary. Only you know exactly what you want to accomplish with your e-bikes: is it for commuting or for leisure, how far you need to travel, what is your travel terrain like (flat or hilly), how fast you want to travel, how much electric assistance you need, how much cargo, pulling a trailer, etc...
I recommend that you research e-bikes on the net to get a good taste of motor types & sizes, battery types & sizes, etc... If you have that kind of money available, buy reasonably affordable bike(s) and save some of your money to replace your battery(s) in the future.
Really, all you can do is try an e-bike for yourself. If I were you, I would buy a conversion kit with ample motor (700+watts, direct drive) and battery (lithium, 48v, 20or30ah) to handle the distance and hills you speak of. (Not sure of your Utes existing brakes but with hills you will need good brakes.) Because you say your commute is hilly I would pay special attention to motors that have regenerative braking which could add power back to your battery on your hills. Try it out and see if it works for you. If it does not work out then you always resell the kit.
Last edited by Pedidelic; 02-17-12 at 04:16 PM.