Can someone recommend a good visa agency that can assist with marriage visas in Koh Samui? We were using Assist Visa in Chiang Mai and they handle everything for 3k baht. Looking for something similar in our new province. Thanks in advance!

Easy to do the marriage extension on Samui, no need for agents. 

Here's Samui immigration check list for marriage extension. 

Thanks for sending this list! It's helpful for sure and maybe we will try it on our own. It's just that the wife doesn't speak fluent Thai because she spent most of her life abroad so she feels more comfortable having a translator who knows the ropes. Sometimes these things can change depending on who you speak to at the office and we've learned it can be well worth the extra money to have assistance. That's just our experience though. They can be a bit difficult in Chiang Mai.