When I was younger, I always looked at punkers who were squatting buildings. I also visited some and some were quite nice. It had all the basics and the atmosphere there was unique. In Budapest you have the principle of Ruin Bars. Old, decayed buildings are transformed into community centers and bars. The best parties were to found there.
My idea today is to create a hotel network of guerrilla places to stay. You basically turn empty buildings and places into sleeping facilities with extra’s. You charge travellers for their stay and make money by offering extra services such as food, drinks and parties. Living adventurous for the B&B operators, adventurous lodging for travellers. Both will have an awesome time.