I would recommend that you apply for a 90 days Non O visa at the embassy at home first. You can just use your bank at home to verify your income/funds. Then you will be able to open a bank account within a month and bank the required 800K baht to apply for your first year extension of stay in Thailand.
You might also come on a 30 days visa exemption or 60 days tourist visa and apply for a 90 days Non O in country if you get an agent to help you opening a bank account to bank the required 800K baht at date when you apply. (At Jomtien immigration they demand two months seasoning in your account before you can apply as well).
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