What are the details for extending a DTV Visa in Thailand, including costs and required documentation?

The DTV Visa allows a stay of 180 days in Thailand, but extensions are challenging. To apply for an extension, you generally need updated paperwork and proof of 500,000 baht in your bank account for at least one month. Immigration tends to be strict about this visa, and many have found more success with border runs instead of extensions. It's also important to check in with local Immigration every 90 days during your stay.