FYI - Been for my appointment at vientiane and they require 3 months of 500k showing in your account.
TLDR : Answer Summary
Recent experiences shared by expats indicate that when applying for a Thai visa in Vientiane, authorities require proof of a balance of 500,000 THB maintained for three months. In Hanoi, a similar requirement has been noted, with applicants being asked to log into their online bank accounts to verify balances. Additionally, while discussing payment methods, it was confirmed that only cash payments in baht are accepted in Vientiane and Savannakhet for visa fees. The conversation also touched upon the future E-visa process, questioning if it would allow for online applications regardless of the applicant's location.