I think you will be okay then John. Instead of spending money with lawyers, why not get someone that can talk Thai and English to sit down with you as a family and talk things through. Explain your needs/concerns and what a good solution looks like for you and your daughter as well as the fact you will continue paying every month. I suspect they will be willing to accept your ideas.
I hope everything works out for you and your daughter. I realise it's a stressful and difficult time for you all.
it was to do the translations, paperwork at Dept of Consular Affairs, documentation at Amphur and providing the interpreter and witnesses for the marriage.
I didn't go into it too much as I said, but wished I had later after about 4 trips to Bkk!
The ID card is completely different to citizenship, I agree life is too short for that. The pink ID card saves money at some attractions (you get the Thai price), acts as ID instead of using passport and I believe easier access to government healthcare. Probably other things as well.
It's a lot of running around going to different offices on different days.
I am opposed to agents for visas, but if I was to start this process again, I would pay an agent. I think I was quoted something like 8,000 baht and thought nah I will do it myself, but with hindsight 8,000 would have been a small price to pay.
When you get your passport translated, keep copies as they will be useful if you ever want a Thai ID card.
Definitely get an international driving permit before you travel. This allows you to obtain the Thai driving licence without doing the driver training other than a 1 hour video.
You also need a medical certificate, but you can get that at any doctors for about 200 Baht.