I'm not an expert, but this seems quite a complicated thing to do. Are you of retirement age as that might help. Do you plan to get the non O before coming to Thailand, if so you can use money from Sweden. If not and as Paul said, your problem is going to be opening a bank account. To get the non O based on marriage when inside Thailand will require you to have a bank account with 400,000 baht. There might be a better way, but you might be better coming visa exempt for 60 days (you can extend this by 30 days if necessary), get married. Fly to a neighbouring country to apply for the non O based on marriage. Return to Thailand, open bank account, deposit money and 2 months later extend your stay for a year based on marriage. I hope there's an easier way, but that's my thoughts. The reason I suggested retirement non O at the start is that's an easy visa to get and you could use it and the first extension to get everything sorted, then swith to a marriage extension 15 months later. Good luck.
I've moved provinces a couple of times and not been asked for previous leases, but this is Thailand and different offices/officers can ask for different things, seems like you've been unlucky.
calling names, how adult 🤣. I navigated the visa process myself, made my own decisions and took 'impartial' advice when needed. It's very easy for most people.
I would ask myself, is it worth breaking the law and risking being deported/banned (this does happen) at a time when there is close scrutiny on banks and you can withdraw your money in a little over a years time? Up to you, but you have already completed the difficult part of the process.