Does anyone have any experience or contacts for incubator programs that fulfill the SMART visa, startup category, requirements?

Alright, I'm an American and have been in Thailand for 3 years... I have had non immigrant O, but mostly just somehow surviving on a tourist visas. Im too young for a retirement visa, and I am not independantly wealthy.

I have a dream of marrying my Thai girlfriend and living most of our days here together (I wouldn't want to even ask her to leave her family whome she loves very much). How can I do this? I can and have taught English online, and I'm a professional graphic designer with 20+ years of experience.

If I can work online, all my money is and will be spent here in Thailand. Is there a way to do this legally or do I just have to live in the Grey area for the rest of my life wondering if I will be torn from the one place I call home?

Can a marriage visa allow me to work legally online? Or to play out any of our entrepreneurial ideas? There's so much information on this forum and in the webs, but am struggling to find a direct answer to this question. I would love to live a life without fear, and without breaking any laws.