I have a small saas, running for a decade. It makes about a quarter of a salary. I got on an accelerator programme and left my job to grow it. It didn't grow.

I tumbled back into employment, in another field, and love it.

Ny advice would be if you and your friend are two Woz's go for business acumen. A guy on my accelerator programme wanted to make millions and he did. The tech lovers, do gooders and dreamers, not so much.