Have too much pride to be in the junk business? Don't be! Those who are in the junk recycling business make a lot of money and all that is required to get started in the industry is a vehicle to haul the junk around in. You can use a car but it's best to have at least a small pickup truck. From there your biggest expense is gas and maintenance on your vehicle.
How do you find the junk? Well, it's all over the place. You can go to local car repair places or metal shops to see if they have metal they put out daily. Also, you can keep your eye on Craigslist to see what people are putting out for free. Finally, if your vehicle is up to the job, you can even pick up junk cars. You can sell those cars whole to a junk yard or, if you have the knowledge, you can break the car down into parts and sell them for even more money.