@Crystal ******
You won't get a job "working for cash."
To work as a foreigner in Thailand you have to get a job, and a visa that allows work. Foreigners also have a minimum salary they must receive to qualify for a work permit, and that is about 6x more than what a Thai employee would receive, so you have to have some type of special skills that would make you more desirable than a Thai employee because they could hire 6 of them for the same thing they pay you.
Your best option is to find remote work from your home country while living in Thailand with a DTV.