The Doctor's eyebrows shot up. "No! No, I don't want...no. Get a house of my own? With windows and doors and carpets? Can just barely handle a room. It's the..."

He gestured a bit to the horizon.

"Freedom of it all. Having a place that can run with you. Do you...I don't know if you understand. Like...if your fastest carriage was also your home, you could take anything with you. It would be worth it to hold onto it because you'd need it while you ran. But if all you have is your feet..."