Max - You're luck is more common than an exception! I just purchased 2, 4 unit bldgs in Indy this past July. Bought them on the cheap, but settled due to have decent plumbing, electrical, and structure in place. Since buying the houses, I've had a rash of bad luck...
A) 2 - 20 yard dumpsters filled and emptied of old tenants trash
B) Electrical fuse boxes and lines stolen from one home for the copper - $7500 to replace 5 breaker panels, meter units, shut off switches, etc
C) Copper plumbing in second house stolen, replaced with Pex
D) Multiple frozen / busted water lines throughout the houses, was never "winterized"
E) And though the houses have been vacant for over 2 years, Indianapolis dept of health has found someone to pick on, giving me multiple fines for unsafe housing (missing gutter downspouts, cracked porch near steps, and get this...the plywood that was used to board up the windows was not painted the same color as the house!), etc. Code enforcement had me pull a permit for replacing exterior doors, windows, some siding, and I couldn't reshingle the roof without permits. Trying to fix the place up and make it much nicer than it was and I've had nothing but trouble from the dept of health / code enforcement.
Good luck, keep the head down and grind away.