What are the requirements and process for obtaining a Non-O multiple entry visa based on marriage in Thailand?

The post discusses the Non-O Multiple Entry Visa based on marriage with a Thai national, specifically detailing the process of obtaining a 60-day extension for visiting family. The author successfully completed this extension at their local immigration office in Sisaket, providing copies of their wife's ID card, the tabien ban, and their marriage certificate. The extension costs 1900 Baht and can allow individuals to remain in Thailand for nearly 17 months without needing to prove financial support. The comments elaborate on the variability between immigration offices regarding the number of extensions allowed per visa and confirm that a yearly extension can be applied for based on any entry, although proof of funds may be necessary.