turn it into my only income.
See Yot's reply above.
Now I know this will be tough
Yes it will be. More than you can imagine.
but is there anyone who has and succeeded at it?
Yes. However, most succeed selling specific parts of the cab only. Like only selling the CNC'd frame, or only artwork, or only encoders, buttons, etc.
Does anyone have an opinion on it?
Yes I do.
Am I crazy for thinking this?
Yes.
Tips?
Try and build and sell just one cab for at least 40% margin first. Selling one to your frieds doesn't count. In fact, that's probably a long-term bad idea.
Anything helps guys thank you.
You are welcome.