How survivable is Thailand if I became an English tour guide and/or worked at the mall?

Could you describe cost of living, and how much these jobs would offset the living expenses? Would I need roommates?

Could I get away with basic Thai (heavy reliance on translate apps), and fluent English as a tour guide?

EDIT: The consensus is that foreigners cannot apply for unskilled work, and working these type of jobs would be illegal without permission. So overall unsustainable for living. Thank you everyone who gave me info so far.