I think the wait period is quite short like 14 days? When does your Indonesia visa expire? You may be called back. All the lines are not connected (Yes, you could go back into Thailand, no need to mention your plans) -- You have an apartment. I have done a few turn arounds myself. But all in all depending on when you sent in your DTV paperwork, likely you will hear back within the business week. A Sunday flight seems a bit short-sighted.
You could probably use a marketing agent, someone who can build you into a brand maybe? A website and some records of your financial stability. PM me if you want to see some work prospects that will save you a long-term issue. (8 yrs in Thailand - I understand things). Cheers