You could start with Pygmies. At lllreptile.com they are $29.99/pair (they can be kept in pairs. Then they sell complete care packages for the cage/lights/ etc. at really good prices.
I would NOT suggest pygmies for a first cham species. They may be small and easier to house, but almost all are wc and they can be very difficult to treat for problems due to their size. Getting their tank setups adjusted just right takes time and experience. They are even more secretive about health problems until they are just lying on their sides dying. Not the first cham experience I would wish on a newbie.
Considering your "limited budget", what about a qualified herp vet in your area? Chances are you will need one sooner or later, so find out about this before you dive into chams. Vet care for chams can be expensive and frankly, I am one who hates to read the common forum thread starting off with
"HELP! My cham is sick and I don't have a) a good vet close by or b) I don't have the money for a vet."
Just not fair to the animals or the keeper.
I am not trying to discourage you at all, but suggest that before you decide you must breed, think about these things first:
Will you have space and buyers for all the potential babies? There are lots of baby chams on the market.
The amount of time even one cham needs every day.
The amount of space for individual caging for your pair.
The cost of a variety of feeder insects, their care and feeding
and,
your daily, monthly, and yearly schedule and how cham care fits into it. Are you in school? College? Planning to move any time soon? Travel a lot? These are not animals that can be left unattended for more than a day unless you have automated misting systems or humidity and temp controls.