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@Jeremy *******
said you can get TWO 30 day visa exempt entries by land in a calendar year (Jan 1 - Dec 31).
Here's a thought, you're on a 30 day visa exempt entry now, so go get that extended by 30 days at the immigration office for 1900baht, THEN go to a thai consulate in another country and BUY a single entry tourist visa ? That'd get you stamped in for 60 days and you could extend that by 30 more days at the immigration office.
Doing that buys the time you say you need until your'e going to get a 'work visa'.