Yes it applies to you and no you can’t do it on line as the first one must be done I. Person and generally people leave after 180 days resetting the 90 day reporting
once you open your Thai bank account and deposit 800k you apply for ‘ extension of stay based on retirement’ before the 90 days is up and get permission to stay for 12 months and you do this every year but you need the non- O Visa to start with