I came to Bangkok on a guardian visa with my kids on their ED. Once I opened a bank account with kasikorn, I cancelled all of our visas and changed over to the DTV after 2 months. I highly recommend getting the guardian visa first, because the kid's school will give you a letter to help open a bank account
The ask:thailand community, consisting of multiple Q/A groups with over 100,000 members, powers this platform. It is not an official government resource. Our members actively contribute to this resource, and while we strive for accuracy, we cannot guarantee its complete reliability. Assistance to travelers is provided as a community service.