He was somewhat of an itinerant. He would go from mathematicians house to matheaticians house, stay and work for a few weeks and then move on. It is said of him that all of his worldly possesions fit into two bags.

On arriving at a new home he would declare another roof another proof

I read that once he was walking along the street and tripped. He was lying on the ground and someone came to help. Erdos said, Don't disturb me you fool, can't you see I'm working