For my TR visa a year ago I added a screenshot of my bank balance for finances and had a 1 week hotel booking for accommodation. I’m sure you could book a free cancellation hotel on agoda if you’re worried about it just for the purposes of the visa.
I believe it’s the Non-O based on being a dependent. The same one the op would get for his wife. I was told this would be the one I get for my daughter too after I get my non B
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