perhaps. I will go onto a long term visa next as my wife is thai. It just didn't make sense to that until I've been back to the UK wherw im headed next π
I have just done two border runs from bangkok after finishing a one year education visa. The first i flew to Cambodia spent two days there and then returned. The second i did on the coach from bangkok and had no issues either time π
for the UK visa she has to write as part of her application. I think you can add as much supplemental documentation, the more you have the better. Its about presenting the application as a story of why you'll fullfil everything they want..
It always made me laugh getting rejecting for not having enough reason to return to thailand because we love it here π