As one of many upgrades needed to our 1920s Chicago-area 4 square house, we're considering re-wiring our house that has knob and tube wires and plaster walls throughout. We also want to upgrade our panel to 200 amps. We have basement and attic access.

What's a reasonable cost range that we can expect for a whole house re-wiring project, including patching any wall damage?

Also - I've heard some electricians will only do time and materials estimates. How long do such projects typically take if done full time and how many people usually work on it - 1, 2 or more people?

I realize there are a lot of variables involved with the project, but any rough estimates are really appreciated.