Do they have to be commodity futures? Why not index futures. Also, you can get away with trading a far smaller amount now with micro contracts. $5,000 with a single micro ES contract cost you all of $50 on a 10 point drop. At only a $1 round trip contract fee this is very doable for a tiny account. $5,000 gives you a 1,000 point cushion to play with at only $5 a point.
BZZT! You are forgetting the performance bond. A single MES has a $1,188 deficit on it. So you do NOT get a 1000 point cushion to play with.