Many who don’t qualify for a standard visa (such as a business visa or retirement visa) do “visa runs,” where they leave the country every 30 days and re-enter on a new visa waiver. Rules for visa waivers have been in flux for the past few years (at times you can get successive back to back waivers, sometimes you can only get 90 days worth in any 6 month period) and can change at any time. Another option is to get an Education Visa. All you need to do is study part-time at an accredited school and you’ll get a one-year Education Visa. If you're going to be here for a while anyway, why not study Thai? It's a great way to immerse yourself in the language, and the cost ends up working out to less than a year's worth of visa runs. There are many schools offering these programs and the average cost is about 30,000 baht per year.