Metv application help is rental aggreement ok for address a year aggreement

Please kindly advise, is it possible to get Single entry tourist visa (from Laos) and extend for another 30 days (90 days in total) then travel back to the country of residence for a month and then apply for METV? Thank you for advice 🙂

After the update on the London E visa application site, I've seen a report that the Embassy and consulates are specifically asking for the letter from your employer to be addressed to the embassy or consulate when applying for the METV. Somebody reported a successful E visa application but it was noted the letter wasn't specifically addressed to London

I found that the Liverpool consulate has updated it's requirement to reflect

5. A letter from the applicant’s employer (in the UK) and addressed to the Royal Thai Consulate) stating length of service and expected return to work. If you are self-employed your self-assessment form.

Where is the best place to apply to get a new METV in SE Asia with an American passport? I don't have to go back to the US for this, right?