Just a datapoint/fyi: applied for ED visa at Vientiane consulate and was required to provide bank statement along with all the other usual documents. My language school had said that I didn’t need a bank statement when applying at consulates in Laos, so I ended up having to print it out from the small print shop in the consulate for 80 THB per page. Hope this helps someone else avoid the expense and headache of printing it out on site.
TLDR : Answer Summary
An expatriate shared their experience applying for an ED visa at the Vientiane consulate, indicating that they were required to present a bank statement despite being advised otherwise by their language school. This highlights that requirements can vary, and some applicants might be asked for proof of funds at the discretion of the consulate officer. Additional comments discuss the nuances between showing bank statements for visa applications versus cash upon entry into Thailand.