Hiring a car is the sensible option, due to putting unnecessary miles on the zed and general wear and tear as you say.
But as you have only just got it you probably want to drive it all the time as i did and you might get a few miles up the road in the hire car and think 'wish i'd brought the zed'
If you think with your head then hire one, if it's your heart, take the zed, lol