What are the requirements and tips for obtaining a SETV from Vientiane?

A user shares their experience of obtaining a Single Entry Tourist Visa (SETV) from the Thai Embassy in Vientiane. They initially believed they needed to present 20,000 baht in cash, but the Embassy only required bank statements instead. They noted the costs associated with printing bank statements at the Embassy, including a 50 baht charge for using WiFi and 80 baht for each printed page.