If your landlord rents out 5 or more dwellings, they are now required to charge you only the government rate without any markup.
You could ask your landlord what they plan to do about the new law as a polite way of starting the conversation. Of course they will want to make a new lease that matches the new law, right? ...
If you are working online for on overseas company on a DTV, that is not "working within Thailand". You are not allowed to have a THAI job, working for a Thai employer, being paid in Thai currency to a Thai bank account, unless all the regulatory boxes are ticked.
I said that immigration officials view cryptocurrency with suspicion, so while you could in theory use it to show proof of funds, it would be counterproductive and is not advised by people who know what's going on in the decision-making process.
It's not a 7 day "extension". Technically they deny your extension and give you 7 days to leave the country. There is no such thing as paying to overstay when you have been ordered to leave.