As others have said a pastel female is going the cheapest option but you want to make sure you get a good one and not just the cheapest female you find. Females tend to go for more than males, but if you are looking for some long term problems you might want to consider a mojave/lesser/butter/enchi/fire/yellow belly. All of those are co-dominate morphs so you could start working on some longer term breeding plans.
Only het Clown?