There are a wide range of homeless people. Some are hopeless junkies that have no goal beyond staying high until they die, but others are just regular people. Hell, I've technically been homeless twice when I was between apartments for month, and you'd have never known it unless I told you. I was employed full time, I had a car, a PO box and a storage unit. Nobody at work knew. I just went on about my life as normal. For sleep, I would sneak into a campground after dark and sleep in my car. Then I'd use their shower in the morning, and show up to work on time and freshly showered. No one suspected a thing.