What is the best visa approach for working part-time while retiring in Thailand?

The user plans to retire in Thailand and is exploring visa options for themselves and their spouse. The wife will apply for a NON-O visa, while the user seeks to work part-time teaching English. They inquire whether to start on a tourist visa and transition to a work visa after securing a job, or if they can obtain a work visa beforehand. Comments indicate that a tourist visa should be used initially, as a work visa can only be obtained with an active job offer.