Canadian   70 years old with ThaiWife.  In Phuket.    I  have had 2years of non O visa s,  3 rd due to start Feb1 st. But with insurance costs? and the fact we leave April 15 th (73days after visa finishes) looking for possible alternatives      Can I ask for 60 days to visit Wife          then extent 30 days ( or pay 13 days over stay @500? ).        Could perhaps do visa run Feb 1 st get 45 days and extend 30.              Will re apply for   non O depend visa  next    November as we will be here for 6 months.                    ???????? thank you for any positive recommendations.        

Doing a border run to get a visa exempt entry may be your best option since the 60 day extension will give you enough time. There is no 30 day extension you can apply for.

A extension based upon marriage to a Thai requires no insurance to do the application.