Oh, just go to immigration and fill out the extension form but request 60 days instead of 30 days . Your TM30, and the proof that your wife is the owner of the house. If she doesnt own her house, I think the booking called a tambien baan. Also a marriage certificate and her ID.
Definitely not ISSA unless you want to be ignored. I've heard very good things about:
1. blueprint, can contact at :
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and from others in the Facebook group, I have heard they arw very responsive and have been successful with all applications. They offer a 100% money back guarantee if not successful.
2. I have heard nothing but good things about baan thai as well.