douglasspade

Indeed elviajero that sounds better, I am 38 so I can apply for one of those. I will do some research.

But does that mean I can never have a permanent resident visa? Can I open a bank account at least? Buy a property on my name?

I work abroad anyway,  I haven't been to my home country for 3 years.

Let me explain a bit better. I work in West Africa (... never ask me what I do...) and I have the relevant visas for these countries. I have been coming in and out of Thailand on 30 day visa free entries for the past 2 to 3 years. My RnR's are spend in Thailand.

As I want to get married soon to a Thai, I want to start planning ahead.

I want to permanently stay in TH as my home, while I still work abroad. I need to open a bank account and buy a place to stay, a car, a dog. No maybe a cat.

The idea for me is to set up a home and stay in Thailand permanently, working abroad until my legs or heart fail and I can come and enjoy my old age with my Thai family. 

On the " Non-Immigrant Visa B " shown on here http://www.mfa.go.th/main/en/services/4908/15388-Non-Immigrant-Visa-"B"-(for-Business-and.html it states that it is issued to applicants who want to work in the country.

I do not want to work in country, I work abroad but want live in Thailand. Did anyone achieve success with this? Can it be done?

Yes. He will be able to transit as he will not enter the country for stay.