Does it matter whether my TM30 is from an Airbnb or hotel for obtaining a COR in Thailand?

Check the requirements for the bank you are applying to. Not all of them require a residence certificate or a TM30. Passport, Long Term Visa, Lease, and Taxpayer ID info might be enough.

If your are smart and have knowledge about life, you will know the answer. If I were you, I just take this all comments as my reference or just basic information. and go to bank or immigration office near you and try to find it out. maybe it looks easier or difficult. It all depends on who you face. So go and find out. And please do not apply what you read here to the real officers. Just be humble and cool to them.

I do not disagree what others here said or opined. Freedom to saying is here. However, it all depends on who you face. Some immigration officers can ask you about rental agreement. Even, some ask you for long term rental agreement, like more than 2 or 3 years. Do not ask me why, I am not immigration officer. But this is so in some cases. I think your first task is to open a bank account in a thai bank. The first huddle. nowadays more harder. It is always again, all depends on who you face. some bankers need long term lease agreement. or some just need COR. certificate of residence, or some needs driving license. In my case in a thai bank, they need me to get a stamp of RETIREMENT. It must be clearly stamped by RETIREMENT. that no immigration can do. Is there any chance to get a stamp of retirement? Anyway, you have to try. If you are lucky, you can get all things so easy and smoothly. who knows? Immigration things are more than banks, i think. but no one knows who you will face. Just have to try and good luck

Immigration has no way to know that your TM30 is from an Airbnb or a hotel. They just see that you have a valid TM30.

As long as you're applying from an office that doesn't require a lease (I don't actually know if any offices that requires this) you should be fine.