You may have more than a hard time finding boarding house information way back then. I do not believe at that time a license was required to operate servicing boarders. I know of a family member that way back in about 1937 that used to rent out rooms of the top floor of her house to boarders. These boarders were always refereed to her by someone else and were looking for short term lodging. Probably somewhat like the young man that you are seeking. Back in the late 20's and early 30's (right after the depression) there were numerous homes that took in boarders. It is not likely that many of them were registered anywhere. Happy hunting. Mary