Depending on where the house is, I know my brother inlaw had the local Fire Dept. come and train in the house for a couple of weeks. When they where done they torched the place, and let it burn down to the ground. Didn't cost him a dime.
Around 10k, try the fire dept like mentioned above. You do have to have plenty of land around the house for them to consider it though. I know a couple people who have done this.
my brother bought a new house where the old one was demoed by i think the police dept. He said they were throwing granades in the house and the garage looked like a pretzel after it was repeatedly driven over by a tank! afterwards they demo the rest of it for you. i heard about the fire dept doing this to but i would love to see that tank lol.
My neighbor's old guest house was done with the fire dept. They sprayed our house the entire time with hoses. I was in 3rd grade and it was super cool.