Why not buy a 2nd hand EV? It's a lot less risky than buying a 2nd hand petrol or diesel car.
Not sure on your budget but if you're not going to be doing many really long trips then something like a Nissan Leaf or a Renault Zoe would be worth looking into.
Remember that due to the running costs being so low, if you have a monthly budget you can afford to spend more on an EV than a petrol car because you'll be spending next to nothing on fuel / servicing etc..
I'm a little concerned what state the battery would be in after being used, I'd need to look more into them...