â€¢ Problem Drywall
â€¢ Fire safety devices
â€¢ Electrical distribution components
â€¢ Gas service piping and fire suppression sprinkler systems
The HVAC system will also have to be reviewed and most likely components replaced. Then you would need all of this signed off as being completed to standards with permits. It would require a significant discount on the property for you to make money on this. The liability may also be an issue should health issues arise from buyers of your homes that you have rehabbed and flipped.
Secondary options, contact a local dry wall supplier, give them the sqft of your home and they can give you an estimate on supplies.
Contact some of their vedors and get an estimate on labor.
Then estimate what it will cost to have everything in your home placed in storage for a week and then re-set up after the painters finish.
Oh yeah, contact a local paint supply shop and get an estimate on paint and labor and if you have any trim that will need replaced, contact a local trim carpenter and get an estimate on the trim.
Best of Luck