@Nongnuch *******
Thank you for letting me know. My tourist visa actually does expire in a week and I'll need to leave Thailand before then so I won't be able to get an agent to open a bank account for me before I leave.
With this new knowledge I have gained, I won't go to the Thai embassy in Penang anymore. I was still thinking of going to Malaysia for a holiday though. To my surprise, it looks like there aren't any flights to Savannakhet from KL, or if they exist they are probably too expensive.
They do have decent flights into Vientiane though. I saw that they have a Thai embassy in Vientiane. Not sure if you have heard much about it, but I was looking at requirements on
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and It doesn't mention the financial requirement here from what I can tell. It would be a little more convenient but It wouldn't be a big deal to make my way to Savannakhet.