the rule is 800k two months before application and three months after. Then the balance can drop to 400k for 5 months before needing to be back to 800k two months prior to the next application.
Many who can afford to just have a separate account for the 800k and don’t touch it.
Non OA is a different ball game. Many use it as an entry scheme as it doesn’t require funds in Thailand and on entry you get a 365 day stamp. If used wisely it can be a great option for two years as long as you have the insurance and bounce just before it expires.
The second year isn’t multiple entry but you can buy a multiple entry re-entry permit for 3,800 baht.
The problem for some is that to extend you need insurance. That can be difficult for those over 70.
you’ll need to check on the embassy website for the requirements for the London embassy. It’s pretty straightforward but you need to supply all documentation as required.
Yes. A Non O would be valid for 90 days from issue. Depends on the date you intend to travel but don’t apply too early. Typical turnaround times from London are 3-5 business days if you have all the correct documentation.
Usually easier to get the Non O visa from London because it makes it way easier to open a bank account here. Can be done here but just easier with a non immigrant visa.