I'm always looking for the most inexpensive ideas. Having 2 boys that I love to take hunting I found the cheapest camo is to buy sweat pants/shirts and throw them over jeans/shirt, shorts/tee shirt or right over your boxers just depending on the season.
Scent control is always key, so adding your scent spray to both the sweats and your first layer is important. Sweat pants usually cost around $15 and sweat shirt another $10 plus one scent spray container, $15 which is enough to last a few days on 3 people. I can outfit myself and the boys for $75. That sure beats paying $100 plus for one pair of camos just to have them or me outgrow them in one season.