Linz Gelsthorpe
No need for an agent at all; mate--- you easily qualify with 800k each. Transfer from your separate UK banks (account in her name, another account in your name) to the 2 individual Thai bank accounts you'll need to open separately in your own names, respectively)
Bangkok bank inside EmaemQuartier, Phrom Pong BTS SkyTrain station--
is easiest these days...
Get here on 60 day tourist visas; extend for 30 days in Thailand (cost 1,900 baht)
You'll have plenty of time to get everything sorted. No insurance requirement but please do get good, comprehensive insurance anyway.
****************************