Yes. The money must be in a Thai bank and age (at least 3 months I think?). It must stay in the bank almost year round. I think you can withdraw down to 400k, but I'm not sure of the timelines here.
You'll have to get a certified statement from your bank as well.
I'm sure others will chime in here with clarification or corrections.
Buy what we call a "throw away ticket". Super cheap one way to Kuala Lumpur or the like. They may not ask for it, but if you don't have one, it's a sure thing that they will ask.
It would be WAY cheaper to store the stuff your husband can't live without, and start new here. It is hard letting go sometimes, but once here, he will most likely realize you don't need any of it. With the storage option, you can always retrieve it Iater.
Furnishings are super cheap here. All the expats have been in your spot and are advising you. I've been in Thailand for 9 years. We came with 3 back packs. It was great not to have to deal with the "stuff" headache.
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