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.
Get the non O instead. No mandatory health insurance or criminal checks. Yes you need to deposit 800,000 in a Thai bank, but if you send 65,000 baht per month, you can withdraw the 800,000 when you get your second 12 month extension.
Excellent post, and good to see one that explains exactly how it is done and goes some way to 'myth busting' the usual comments that it takes a lot of time/work and requires agents etc 👌👏👍