Your description is so vague and honestly, no one can give you proper advice without being there and looking at it themselves.

As an electrician who has worked on homes where the bright homeowner thought they knew what they were doing and could save a few bucks….just hire someone.

If you do things wrong or end up leaving a confusing mess, you could very well end up paying more than you otherwise would have. When contractors show up to a “handy man” repair job, it instantly puts them in a bad mood. Want someone in a bad mood working on your house? Fixing what is wrong? Want someone who is saying to themselves, “well, this is how ‘thisaccountforwork’ did it and, while not right, it still works and that’s how he did it so I’m not messing with that mess” to do it?

In addition, demo is the quick and, for the most part, easy part for contractors. You won’t be saving much if you’re still paying them to come in and wire new.