@Farzad ******
1) There is no such thing as an APEC visa.
2) I promise you it's perfectly normal for people living in Thailand and employed in Singapore / HK (and I am sure other places) to travel to their office or other locations 20 times a year (I am one of them). They would just need a work visa / pr or citizenship in the country their firm is in. Yes the Thai stamps in your passport get annoying and yes it is exhausting but hey ho.
3) The OP's reasons for travelling 20 times a year are totally clear. He is going to Indo to see his family.