Ummm, shouldn't one have a copy of their birth certificate and marriage license already? Even if one doesn't already, getting copies of those docs is highly advisable (e.g. to obtain a passport). Let's pretend the cost for the documents one should already have is $100. That's a one-time cost for documents that are potentially useful for other necessary purposes. BTW, anyone who already has a REAL ID compliant drivers license already has an ID that satisfies SAVE Act ID requirements.