Granted, some Immigration Offices will not issue then for a tourism entry stamp but the ones in the tourist areas and many others probably do. I'm pretty sure everyone that has recently posted after getting one was not just Bangkok based. Which agent do you work for BTW?
"Basically an METV would allow me to leave and renter Thailand to give me 150 days I need " this is the only correct statement you made but whether you can get one without travelling "home" is a different matter
Correct as there are differences from office to office so your local Immigration Office checklist is the place to start then come here with any questions
yes, 2000B whether 8 days late or 8 months late so if already day 8 or later forget about it until the next extension is due otherwise you could pay another 2000B for another missed report in the same period
Normally your first Extension of Stay based on a Non-O issued in country has to be at the same Immigration office that issued the original Non-O. If you are travelling to Phuket, for example, you can ask them if it is possible to get your first extension there,