Pensioners and wealthy foreigners must have insurance coverage of at least US$50,000, to cover medical fees, which is valid for at least 10 months or a social security certificate covering their medical expenses while in Thailand or a cash deposit of at least US$100,000 in a domestic or a foreign bank account for 12 months before applying for the visa.
High-income earners must have an average annual income of US$80,000 for the two years prior to applying for the visa.
The foreign specialists must produce an employment contract from a business in Thailand or abroad. They are also required to produce evidence that they have worked in the “targeted industries” for at least 5 of the 10 years prior to applying for apply the visa.
Apparently the mall management didn't pay the electricity bill so it had to close temporarily. Advise you check with a local group to see if it's reopened yet
It is 200,000 baht and it applies to people who first entered Thailand before 21 October 1998. It is not a rolling date, so getting 20 years up now makes zero difference.