Hi People. After those wonderful animations and pictures, here's a nice fascinating text to complete the boredom.
Since your house has been rented out by some moron, there are five options:

1. Those guys clear off.
2. They "get cleared off".
3. They sleep in the tent/chalet/attic/shed.
4. You "rent" a room from them.
5. We sleep in the attic.

Let's discuss this, shall we?
Point 1: Unlikely unless we start singing opera.
Point 2: That'd be mean. On what basis can they be thrown out?
Point 3: Somehow that seems ubber, not to mention oober unlikely. Don't think Grandpa would be too thrilled...
Point 4: If anyone should be renting here, it's them!
Point 5: This is what the actual post will be about. The other points were just space-fillers!

Sleeping in the attic: the pros and the contras:
PROs and CONTRAs mixed:

+It's out of the way. Which means the lounge would be free. Grandpa would be less stressed and annoyed about the mess.
-The question is whether Grandpa and your parents would let us stay up there, 'cos the ladder would have to be kept down during the night.
+There are beds up there and that sure beats sleeping on the floor.
-There's so much junk on them. Where to put it all?
+There's a toilet and a sink up there! Fully functional and everything.
-It'll be very hot up there and stuffy.
+If the windows are kept open at night and the ventilator (maybe) brought up, it'd be cool (as in cold, not groovy).
-It’s dirty up there.
+Ma moom said she could clear it out when she goes there on Thursday.
-It’s annoying to have to keep going up there to fetch stuff (swimming costume, hat, sweater, new socks, etc…)
+We could leave some stuff downstairs, in your mother’s old room for instance.
-If someone stays up late and watches TV it could be disturbing for us and the ladder would get in their way.
+There’s a door that separates the “bedroom” part of the attic from the rest and if the worst came to the worst, the ladder could be pushed up a bit.
-Someone could sleepwalk out and fall down “the hole” and the ladder thus resulting in serious injuries.
+No one really sleepwalks anymore…
-It’s freaky. Burglars could break in!!!
+We’re talking about the attic here, not the chalet! Anyway, that’s not something a good helping of cabbage wouldn’t cure… Booby traps could be set up and the windows could be tilted (if that’s possible).
-We don’t know whether granny looks through our stuff…
+Yes we do… Granny couldn’t snoop through our stuff any more.
+It’s more private => Could watch films on the comp/bring a spare TV up, read and work.
Finito. What do you think? Hope YOU want to sleep