Probably 2,000-2,500 baht if I would make a guess. In the case that you stayed home alone most of the time and cook/use the air-con during the day and night/do laundry.
How about transfer the kid to a gov hospital in BKK? At least gov. hospital in BKK would have better equipment and staffs. Not sure if it would be possible for a young child in critical condition to transfer for many hours though.
For my family, the groom present Sinsod as a proof that the couple have enough funds to proper raise a family before marriage. But for some other family, the parents will actually keep the Sidsod themselves.
I encourage you to start fill out the application form first and you will know what kind of documents you need to provide to the embassy. I think you’ll need an invitation letter and prove of sponsorship. If she travels a lot to other countries they will consider her a frequent traveler and it will help as well.
Hmm.. I applied for it with an invitation letter from my niece to stay at her place. Print all documentations including proof of income and bank account as well. They end up didn't ask me for anything. Just look at the application form and gave me 10 years tourist visa. BTW that was more than 5 years ago, not sure how difficult it will nowadays.