Me and my wife had no money on savings. We did get our apartment valued by an realtor. It was valued to 100.000 USD. They Embassy deemed it to be enough. We just had an paper from the realtor in english. Although the lady at the hatch told us that we needed a contract to prove that we are the owners. But the actuall interviewer did not care for this paper. I guess we looked like decent folks! We did get an affidavit of support aswell. Just to be on the safe side, my friend who lives in the US was kind enough to step up. But they didnt bother to look at those paper. Everything turned out just fine. - This was in Sweden. It was very laid back. Just thought I should share how things ended up for us.