No feet...no horse. It is that serious. There are some things you can neglect about a horse and not see consequences for a very long time. Feet do not fall under that category. I'm surprised that you got away with it this long. His feet are in horrible condition, IMO, and badly in need of a farrier. We can't help you fix this. You need a professional to start working on those hooves.
If you can't afford a farrier, then give him away or shoot him. I don't want to sound mean, but his feet will continue to grow and the problem will only get worse. If you keep him and are unwilling to provide the care he needs, things will only get way worse for him. Why let it get to the point that he is in so much pain he can't walk? Get him a farrier, or get rid of him. He doesn't deserve to suffer.