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 👍
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 👍
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 😂
I would suggest using a visa agent for your first visa. I did my wife's for the UK and got rejected the first two times. The visa applications are all about ticking boxes. My wifes failed twice on 'not having enough of a reason to return to thailand' so on third application we explained in detail that she needed to care for her elderly grandparent and it was accepted.