that doesn't meet the OP's specifications as you must exit every 360 days, assuming you extend the 180 days for the additional 180 days allowed one time. Given the cost of that specific extension, many people choose to leave and come back at 180 days. The OP wants a visa where he doesn't have to leave for over 1 year.
the QR code is tied into your exact passport number, as the immigration officer will be able to see it on their screen as well, so you can't use a generic QR code or one not tied to your specific online submission.
what does going to immigration to file your TM30 have to do with how long you can stay in Thailand? At the time of filing, no one cares if you say you are staying 6 months or 6 years. That's not the purpose of the TM30. It's just to inform that a foreigner is staying at a certain address within 24 hours of arrival. It has nothing to do with permitted length of stay.
you're completely using the wrong term. You aren't renewing anything by doing a 90 day report. All foreigners staying in the country more than 90 days since they entered Thailand, regardless of visa type, must file a report of where they are living every 90 days with immigration. It doesn't extend, renew, or have anything to do with how long you can remain in Thailand. If you exit the country before 90 days, you don't need to file anything, and each entry starts the count over again.