Even if someone appears to have no close family, they're not a lost cause! If someone died childless, they often left money to siblings, nieces and nephews. I'd start by looking at deaths in the area where he lived in 1911 (that would be Medway registration district, which later became Chatham district). If you find one the right age, look at the probate calendar. It'll give you an address, which may be the same as 1911, or the names given may be relatives. If it names a widow, he may have married after the 1911 census, and you can locate the marriage certificate to find out whether you're looking at the right person.