But it's easier with a visa. People can get a visa before arriving then open a bank account. It's not easy for tourist in UK or USA to open a bank account, Thailand's no different.
or you apply in your own country for the visa. No Thai bank needed. Then extend in Thailand after opening Thai bank account with your visa entry and depositing 800,000. (That's your nest egg) I'd guess having that is like a guarantee you've enough back up money.
your questions been answered by several people. There's no new visa requirements. There's and entry card done on-line up to 3 days before you arrive back in the country. That's any time during those 72 hours prior to your return.
I don't need to do research. There's no new visa. There's a digital arrival card, similar to the old paper one. It starts 1st May. It is not a visa, and many people are telling you this. It's not us who need to do research.
There aren't any new visa requirements. I'm curious why and where people are reading the word "visa". We used to fill in paper arrival cards, they weren't visas, and aren't visas now. But am I missing some wording on the link?