Good evening guys just a quick question

The wife and I are looking to retire to Thailand (Hua Hin) area next Sept.

I currently am on the understanding that I either need 800000 baht in a Thai bank or an income of 65000 baht a month as well as both being over 50 which we both will be just😂

I think I’m happy with renewal process every 12 months and need to show 800000 3 months prior to renewal and 3 months after and it should never drop below 400000.

My questions are

If I was to get a non immigrant O visa in Thailand is there a cost

Does the above funding apply for both my wife and I ( both British) or will she be classed as a dependant.

Thanks in advance