How my wife did it. Was like hello me 'your name' invite my husband 'his name' to stay with me from the date he lands kind regards 'your name' and yes I included a photo of her passport along with the marriage certificate. She wrote it in Thai
well beauty with dtv you get 5 years validity 180 days each entry, non-oa every year you need to go to immigration to extend. But both have pros and cons