Video Camera Photo

Open Question: What is the best and cheepest lighting for my digital camera?

I’m trying to start my own photography business and I need some portable lighting. I want it to be easy to move around, as I will be going to people’s homes, but I would like to spend the least amount of money possible without sacrificing quality. Any suggestions would help me out a lot.
I would also like the kind of lights that flash whenever to take a picture not the kind that stays on the whole time.