Just sign up for skype accounts and get as many numbers as you want, or get a google voice account number and redirect it to your normal phone during the hours you allow calls. Disable the forward when you want it off and not be be bothered. Skype you can sign up and get as many numbers as you need. Very small fee for a monthly or even yearly phone number with skype. But if you can get a google voice one you have more options to use it.
