Sorry, guys, but why Latvia? Seriously. I know that crisis hit Greece hard, but Latvia is no better - only you will have documents and language problems as a "bonus". There are not as many places to accommodate all English teachers, there are only 2 (!) schools for English-speaking kids. You won't make it only on private lessons.
Plus don't forget bills - we have very cold winters and central heating price only keeps rising (doubling and tripling). No social care, nothing to support even locals, not to mention foreigners. Tourism is not that developed, prices are high. Unless you have something unique to offer and prepared to work at least 6 months without profit, you won't make it here. Or you have a job at an international company that specifically invited you as a specialist (usually it's IT, but not necessarily).