Hi Clea,
I'm going to base my reply on the fact that you only have one Chameleon.
first off, stop buying crickets from your local petco or other pet store.
they can be as high as ten cents per cricket, plus tax...that's about $5.40 for 50 crickets.
you should only buy like this when you are in dire need.
this leaves you with two choises left...buying in bulk or breeding them.
both are not great options for many reasons.
mostly because you only have one chameleon, it almost doesn't pay for you to buy in bulk (say 500 or 1000 at a time).
you will never use enough for them to be worth it unless your cham is always eatting full grown adults.
you could breed them.
not a bad idea, but understand that you will need a few 10 gal fish tanks or large buckets/containers to house all the little babys once they start to hatch.
think 1 tank for the 8 or 10 adults that you will always be using for egg laying.
then 3 tanks for the 3 sets of babys that you will work on to always have enough feeders for your chameleon.
each baby tank needs about a week for them to grow before you can start adding them to your "main" cricket keeper. maybe two weeks if they grow slowly.
once the babys are dumped into the main cricket keeper, you can then add another container of eggs to the empty baby tank.
here is a great link on ideas for breeding crickets....
http://skylab.org/~chugga/cricket/
with that said, there is one other way to save money on crickets.
since I always buy some worms about once per month, I include 2 cups of crickets (100 per cup) with my order.
that's $12.98 for 200 crickets with no added shipping. that's just shy of 7 cents per cricket.
this might not sound like much of a savings from the local petstore, but you also have not done any work to get them to the proper size you might need for your cham to eat.
you also wont be over loaded with crickets that will grow too large for you to use.
if you plan to breed them shoot me a PM for ideas. they are not hard at all to breed, but there are a few pitfalls to watch out for, like proper temps and drowning.
good luck,
Harry