I just thought of another potential snafu. Most large banks use very sophisticated software to try and spot fraud and a sudden number of charges on an unused/sparsely used card could potentially be rejected until the account holder is contacted for confirmation. I've been called before--after--a large purchase, so it's a possibility to consider.

Either use your cell number as your home number, or you might be proactive and give the CC company a heads up to say that you plan to make a number of purchases on the card. Actually, that's a good idea if you're travelling abroad, too. I had a friend whose charges in Eastern Europe were blocked when he travelled there.