That's a LOT of money. Can I use a stick to tie the 10-inch knife to? Then encourage him to hang around the INDESTRUCTIBLE hut while he dies of a thousand wounds?
This was kind of my thought too, maybe attach the knife to the hut, pop your head out and piss the T-rex off, it comes over to try kill you and cuts itself.. I just doubt it would do it enough to kill itself before it leart not to attack the hut.