How can I open a bank account in Bangkok on a tourist visa, and are there agents who can assist?

The user is seeking assistance with obtaining a retirement visa and opening a bank account in Bangkok, as they currently hold a tourist visa. They qualify for the retirement criteria (65,000 baht/month) but do not have the required 800,000 baht in a bank account. Many commenters shared advice on finding agents in Bangkok or Pattaya who can facilitate the visa and bank account processes, mentioning that agents in Pattaya might charge less. Some highlighted that certain banks still assist with account openings for tourists, particularly with the right documentation like a lease agreement or blue book. There were also discussions about converting the tourist visa to a Non-O visa without leaving Thailand, as long as one meets the necessary financial eligibility.