Surprised nobody suggested it but you can just get a DTV for your wife, you only need to show 500k baht on a bank account (can be foreign) at the moment you're making the visa, else no requirement to keep them on a Thai bank account for some period of time, and she'd be good for 5 years.

It would work for you too, actually, it's much better than a non-o

Pete Rogers I concur with others, don't bother with a tourist visa at the moment, just get 60 days visa exemption on arrival then extend +30 days in country if needed. No hassles.