I also applied for a 60 day Thailand tourist visa while in Korea in December 2023. I have a US passport. There was never any question to answer about my finances. No question about onward flight. So, I suppose it is different if you are a US citizen. Just want to also make you aware that I completed my application on my first day in Korea. My Korean holiday was 4 days. I was long gone from Korea before they issued my visa 3 weeks later. I also had to arrive in Thailand using the 30 day visa waiver. I did use my 60 day tourist visa a few months later.
Best to bring as much cash as possible. Some bank cards charge as much as $55.00 USD for cash advance of a few hundred dollars. I used my money to prove it. Leave that card in your wallet and only use for extreme emergencies.
not for me. I stay way out in the countryside and for me it feels like the Thai people have given me the Keys to the Kingdom. Never boring. Always learning. Always an adventure everyday. Today I went to a new KFC opening in my neighborhood at 8am to collect a free umbrella and tonight a Football game against Bangkok United.