that is not a plan to stay long term in Thailand, you will very soon be denied entry for abusing the Visa Exempt system and not getting the proper Visa which you obviously qualify for as you already have one
Part of the 800k is only "dead money" for the first year as, for the second and all subsequent extensions, the 65k income transfer method can be used. A small price to pay for indepencence and legal status.
Sounds like you applied online too late as the online window for applications has been recently reduced to 15 days before the due date until 7 days before. Once you get within one week of the due date you report in person (unless you get lucky online) so be prepared.