What's the worst house you fixed and flipped?

[Jessica Vanderveen]

There's a property I"m looking at that has been vacant for 40+ years. The roof has at least been done periodically, but windows are broken, walls are falling down. However, it used to be a beautiful historic house, the location is great (high end street, on the water, close to parks and school). Is it possible to fix something that's been vacant for that long? Tell me your stories!