FYI: arrived Da Nang Sunday Oct 20. Applied evisa that night to Thai embassy in HCMC.
Documents were pdfs:
1. a single statement with funds in Australian bank account of 500,000 baht equivalent.
2. Proof of location: passport stamp into Vietnam and receipt from accommodation in Vietnam.
3. My work contract with my Australian company showing I can work remotely.
Evisa received via email on Wed Oct 23 at 10pm.
Now back in Thailand with a 180 day stamp on my passport.