Chris McNair the other way around, the best is to go to thailand longstay visa website. Thailand longstay is a quasi government company similar to thai privilege visa, 100pct owned by ministry of tourism. If you use a lawyer, you can try one one is called aim bangkok, they just add their fees , I believe thb
*****
extra otherwise it's 6000 thb one time fee from 1 July instead of thb4000 currently yearly fee is thb
*****
per applicant