Go to Bangkok Bank. They have an office in NYC, so it is easy to transfer funds. Do take no for an answer. Just try a different branch, time of day, day of the week, a different person... you know the usual Thai way.
You could also contact an agent and let them deal with the details regarding the children and the visa options that that implies. No insurance is required for the renewal on a Non 'O' visa.
Yes of course BUT you have to do it through the Embassy. Fast service. All done online and EMS mail. Turn around time with no flags on your field... 4 to 6 weeks but can be less (though no expedite service overseas). Follow online directions to the letter. Easy!
depends upon what services you need. Non O + Multi entry permit + 90 Day Reports + whatever " help".... could be right. All depends upon requests made. I know they are a great firm.