High limits that quickly get paid down are not a problem. I've even once called my CC company to request an increase specifically for the purpose of putting th

High limits that quickly get paid down are not a problem. I've even once called my CC company to request an increase specifically for the purpose of putting through one large charge to get the rewards on it--I explained exactly why I wanted it. (It was going to cost me the same if I used a CC or a check.) I paid off the pending amount at the time so the whole amount was available. One big charge, paid off next month, then back to normal.