I've reviewed the thread on credit cards, but I wasn't sure which route to go. We are building a home and the builder told us we can pay the bills for the materials via credit cards. we will be spending a lot over the next year and would like to capitalize on the rewards. Should I rather open one card which would be easiest (and if yes which would be best for this?) or is it worth it to open as many cards as there are and get the sign up bonuses but then need to keep track of everything? would i even be approved to open so many cards within a few months?