You can work teaching English. See the website "Dave's ESL cafe" or "Ajarn dot com". Many expats have been here for years doing that. You get the visa, work permit, salary, occupation... downside: it's a 9-5, M-F job.
At the Central mall on PTY 2nd road, there are real state sales agents with tables and sample models of property resembling apartment/condo complexes and buildings.
The daughter of one of my past landlords buys condos, reconditions them, then sells them at a profit. She gets the available real state offerings from the banks. I've been in LOS for years and cannot recall seeing an actual real state brick and mortar sales office, but have known of the existence of real state agents. I suppose different countries have their own systems.
I also had to renew my passport last Jul (or Aug). The courier service pass back was the most difficult and bitter part. You need to sign up and open an account with the given thai post office link and buy the service. I luckily had an SCB phone app and paid the 100 THB via QR code. You then get an Email with the receipt, which you have to print and send in with the application, pics, and the printed receipt from the US gov fee collecting office (at least they take AMEX). I wrote a long rant about this. The US gov makes us run around in circles over 100 Baht, the equivalent of a one way bus fare in San Francisco. Great idea from our consular service.