We got a credit card with a $10000 limit with no interest for the first 6 months...only used it for IVF expenses. It worked really well. As soon as the medicare check came in it went straight on the card and the gap was never that huge that we hadn't paid it off before the next cycle. DH and I had a deal that we wouldn't start a cycle until the card was cleared...didn't want any stress! After 6 months we closed the account and looked around at other 'special deals' on cards and managed to avoid a heap of interest that way. Worked for us! Good luck