You’ve only had him a week and he’s already free range!?
If you always want to free range him, you’ll have to bunny proof EVERY little thing. Wires, desk legs, base moldings, the bottom of walls, chair legs, and everything else, which won’t look to good in your house. Those little buggers, whether it seems like he will or not, will chew up anything and EVERYTHING. When I first got mine (2), I had no idea how much they loved wires and I was out $200 the next week after freeranging. Not too mention I now have chewed up base moldings.
My bunnies are mainly free range, but they like having their OWN home, their pen. If i’m gone for the day, I have no idea if my bunnies will get stuck behind something, or cut themselves, so I always put them in their x-pen, or in a fully bunny proofed room while i’m gone.
I personally think that you should keep the x-pen, but if you really want to, you can fully bunny proof your house and free range him.