@Harry ********
Americans can't use the combination method. You can only use the combination method if your embassy will verify income and the US embassy does not.
You must use 800,000 in a Thai bank for your initial 90 day non-O visa (no time required in the bank, it just must be in there the day you apply) and then when you apply for the 1 year extension it must have been in the bank for 60 days by the day you apply.
You can start transferring 65,000 baht to Thailand before you get your 1 year extension, and then continue doing that every month for your first year. Then when you go apply for your second year extension, you can use your bank statements to show 65,000 international transfer every month for 1 year. It must show that the funds came from overseas and it must be every month for 12 months. If you're even 1 day late on a month, you lost all your progress.