Is it possible to change from an Education extension (3 years studying Thai) to a DTV (workcation)? Can it be done without an Agent?

There's no path to change from any extension to any visa as such.

You get the extension canceled, leave Thailand and apply for the DTV abroad, using the eVisa system. Once it's been issued, you use it to enter Thailand.

OP, correct advice above.

As for agent to assist with DTV there are plenty.

However you need to apply out side of Thailand and use the e-Visa platform.

Simple Google search will show agents that offer this service (not cheap)

1 hour ago, DrJack54 said:

OP, correct advice above.

As for agent to assist with DTV there are plenty.

However you need to apply out side of Thailand and use the e-Visa platform.

Simple Google search will show agents that offer this service (not cheap)

Yes, indeed. She's been quoted 100,000 baht by an agent, which seems steep!

4 minutes ago, brewsterbudgen said:

Yes, indeed. She's been quoted 100,000 baht by an agent, which seems steep!

When I did bit of research the 100k was complete package including transport to Laos + hotel + food etc.

Whole box and dice.

Half that price if you do most of it yourself.

Think your UK... You could look into DTV obtained in say Saigon if your visa exempt to Vietnam.

4 minutes ago, DrJack54 said:

When I did bit of research the 100k was complete package including transport to Laos + hotel + food etc.

Whole box and dice.

Half that price if you do most of it yourself.

Think your UK... You could look into DTV obtained in say Saigon if your visa exempt to Vietnam.

I'll tell her (she's American). Thanks

9 minutes ago, brewsterbudgen said:

I'll tell her (she's American). Thanks

USA require eVisa for Vietnam. Easy process. 4 day process $25.

Depends where she is located.

If Bangkok and easy access to airport then thats better option that say Laos.

She could contact @ThaiVisaCentre to explore options