Check websites like Craigs List. You can usually pick up cheap hunting equipment on there. I would suggest a 2-man tree stand. Wal-Mart has them cheap. That way you can sit with your son, and not have to worry about the wind as much. I hunt a lot with my 6-year old in our tree stand. I put burlap around it, to help conceal her movements. I hunt with a crossbow, and I love it. You can shoot, and not have to worry about getting busted while drawing-back, like you would with a regular compound.