My grandad is an agent of chaos

My ma just got a text from her mam (my nanny) that my grandad on my dads side is on the ferry to come see us and he could be here from today onwards because he want to visit a friend somewhere else. This is literally the first we've heard of this. What was his plan, just show up at our house?! I love him to death but that's just overly chaotic. I mean it is kinda funny. But not for my poor mother who has to figure out where he's gonna stay