Take your mileage per day and divide by your efficiency: 100 miles per day / 3 miles per kilowatt hour = 33 kWh per day (I'm using 3 miles/kWh, what you get will depend on how you drive). Your electricity bill will go up by approximately 33 kWh x your electricity rate (per day).
On the Tesla forums they say that it takes three to four months if you mail in your application. However, those who apply on the website are getting approved in about a week.
I had almost the same problem. I just picked up my car today, drove home and parked in my driveway (slight uphill incline). I got out and went into the house for a few minutes, then opened the garage door, got back in the car, put it in drive and pressed the accelerator. The car lurched...