Okay. You're the one who came to tell me that the lady is correct when she replied to the original post asking if people can avoid 90 days without issue. I'm replying to you that "without issue" isn't correct. I'm not saying you said it. I'm saying she is not correct.
That's not correct. You can be fined the next time you're visiting an immigration office for documents or others. And again, that's a rule. It's made to be respected.
1. You manage to get your TM30 dealing with the owner.
2. Leave Thailand and back.
3. Find an hotel that is happy to provide you with TM30. Being in the field, I would highly suggest you to check first before if that's okay. You may spend your money in a good hotel instead of the cheapest one that may be reluctant and lazy to spend time on it for a one night stay.
You can leave the country without reporting, but you may be fined the next time you're visiting an immigration office.