Anonymous participant ridiculous or not, inconvenient for you or not, that's the case. Get the paperwork to convert inside Thailand and the problem solves itself.
I don't think the embassy in the UK will issue a dependant (trailing spouse) visa to your wife if you get the Non-O based on being over 50 so you will each need your own visas. Joint accounts generally need double the money in them as it gets split across account holders
Anonymous participant immigration officers know absolutely nothing about applying for a visa outside of Thailand. Applications at consulates are handled by a totally different organisation.
It depends. The money can be in a term deposit as long as you can get instant access to the money, even if that means you get penalised for doing so. It can't be in a term deposit where you can't access your money for any period of time
Anonymous participant because you can't cancel a visa and you can't simultaneously hold 2 visas. A visa application at a consulate will be refused due to the fact you already hold a visa.