My family is coming in on a DTV as well. For my husband they accepted 500,000 baht (soft power) and just the address of our air b&b in Bangkok as where we will be living. The air b&b is rented for just 30 days while we hunt for a permanent residence.
For me and our 2 boys we made sure we had at least 2x the money required to avoid any issues.
Here’s the thing though, we applied in the US and every embassy is different. Some are more relaxed, some more strict. Hopefully this helps a little.
We applied at the LA embassy in the US using a joint account in both mine and my husband’s name and got accepted with zero issue. He got the DTV and me and our kids are dependents
We are starting the process now. As long as you have all the paperwork it seems pretty straightforward but I’ve heard some conflicting stories. I would also love to hear a first hand account of someone that has completed the process for dependent on DTV.
We are also a family of 4 moving to BKK this summer. Homeschool and eating local as well. With rent and transportation we estimate about 3k us a month but we will essentially have twice that. I have an internship for my degree so I will have to commute daily. It really does depend on your family and if you have bills coming over with you. Medical is also something to consider.