It's incredibly common in Argentina to buy a property with a suitcase of cash. In fact I think it's about the only way it's done. Argentina has a tax on bank transfers, plus by various measures the tax on profit of business can be above 100% so no one actually uses the traditional finance system for more than a minority fraction of their use.
Now try buying some property in South America. Or Eastern Europe. Or Asia.
Be prepared for a similar experience OP documents.