Just make it, sign it, video it bring made photo yourself holding it. Keep copies or pass copies to relevant people. That's a Thai will or do the same with witnesses that's a legal Thai will. At least that's the law now. In era of deep fakes who is safe?
Some quality personal items. I brought, amongst other things a cowhide power recliner. I brought my favourite fishing gear. Some quality tools and a cowhide power suite. Quality leather is almost impossible here.