Any adopted change will only become legally effective when it is published in the Royal Thai Gouvernment Gazette. This always appears on Thursday. This means that even if something is decided and launched, it is always serious after publication.
Even the question about work based on donations shows that you are actually informed about the legal situation.It is therefore not entirely clear to me what answers you expect here. Ideally, you should find out about the consequences if you are caught and reconsider your plans without work visa to offer services. And of course donations are also a paid service.
Your hotel, landlord or host must register with immigration. All within 24 hours. That would be the right thing to do, and I'm sure many people will write again and do it not. But that is the law.
Then tell it like it is, it can't be a problem.and report it to Immi through your girlfriend when you get there. Private individuals also have to do the TM30.
Idea in which country you are applying for your TR60. But with the online visa you will be asked why you are traveling to Thailand (visiting friends/family). and you have to upload your friend's invitation letter (with address and ID card).So there is no reason to be asked when entering the country because everything is already known. But don't forget to report to immigration within 24 hours of entry (TM30).
I live there 6 months a year. My partner has her own house car...everything is there. But in total everything costs a lot of money. And the sums you're talking about are the depot alone For the visa if you want to call it that. So no amount that is not available and must be there.