, the signed copies of everything in Thailand have always amused me at Visa time or any other Official paperwork submission
My wife always puts two diagonal lines and signs between the lines when she is asked for a copy of her ID card , Marriage Licence or any other identity , also makes me do the same
I have been doing 6 months here 6 months UK since 2009
Been married 14 years and my Wife has been multiple times back to UK
on a 6 month visa with me, we do the paperwork together
The rules on income have changed this year for Foreigners to stay permanently , and on your income you will not qualify
In your case I think you should start again as you have been refused once
A good agent with good reviews is what you need , dealing through your wife is not a good idea as she may not understand fully what the requirements are