Do you even live in Thailand? The 800k must be a transfer from abroad showing up as international/foreign in a bank statement and bank book.This in non-negotiable at immigration.
No,"Funds for long term stay in Thailand" and "Property Purchase" are the only two reasons that will make transfers to show up as international. But I said show up as international "without a doubt". That's why I said use swift bank to bank transfer for the 800k.
You might have heard of Chonburi immigration in Jomtien. You only need a 12 months bank statement for the 65k/month method. When using 800k in the bank, you only need the bank letter + copies of the (on a regular basis) updated bank book. That's been the requirements here for ages. Transactions incl bank codes in the bank book from Bangkok Bank looks exactly like in the bank statement.
There's a spending limit for a debit card in KBanks app. The default limit is just 20k but "it should" be possible to change.Some changes must be done in a branch.