If you rewire the house yourself then it will only cost you the materials and your time for replacing the electrical wire in your house.
The wire and new outlets etc should only cost you $300.00 to $700.00 but if you hire an electrician you'll be charged $50.00 to $100.00 for a service call and then $50.00 to $100.00 per hour for the electrician to do the job plus the materials cost.
The harder the house is to rewire the more it will cost to have the electrician rewire your house.
But typical costs to hire an electrician to completely rewire your 1,200 square foot house will range from $3,000.00 to $8,000.00