This is going to sound mean, but if you cannot afford a trainer to break him and are afraid of him...the best option would be to sell him and buy an older already broken horse. It will be much safer for you and your family, as well as the horse. Training is difficult and not something that can be done only from the ground unless you never intend to ride. If this horse learns bad habits from you he will become difficult to ever find a home for and may become a monster that could potentially kill you.
Sell him, find a broke horse.