@Brittany Regts, I just purchased a duplex in Ohio that was built in 1930. One side had a tenant and the other side was vacant leaving me to rehab it. I can tell you from first hand experience that depending on how well the former owner kept it you will have your hands full. To date, since December 2017 I have been in a current state of rehabilitation of the one side. Back then they used plaster for the walls so I have had to re-drywall the entire interior, all four floors, install new electrical wires throughout along with a new box, all new plumbing lines, and support beams in the basement to correct the uneven floor. That’s just the tip of the iceberg, be prepared for a full gut in all honesty. Then comes the issues with the other side unless of course you have a complete empty home. As far as a contractor who won’t give you an itemized rehab list, I wouldn’t pick them... you want an itemized list because in a house that old everything that can go wrong will and you will want to replace everything the first time! Good luck!