You certainly could get all females, but that's an expensive proposition to do it that way because when they're guarateed female the price shoots up or they come off the market as a rule. I can see why breeding them would seem overwhelming, but if you do it the way most people do with rodents ("hey look! babies!") then the hardest part should be scooping any babies who show up out of the tank before they get eaten. They're only 2" to 3" total length at hatching and apparently quite appetizing-looking as well as cute.

As far as how difficult they are to breed, I haven't managed to do it yet but from everything I read it's like housing opposite sex rodents together -- if you do that and they're sexually mature, eventually there will be eggs. If you use peat moss or potting soil (without added fertilizer, etc.) or a mix of one or both of those with sand as your substrate, the female will partially bury the eggs in the substrate and they will generally hatch 65-90 days later (higher temp = shorter time to hatching). Alternatively you can provide a laying box and remove it when there are eggs in it, put a top on it with a little ventilation, make sure the substrate stays moist but not wet, and put them up on a shelf somewhere to hatch where there are no adults waiting to eat them.

The females will lay 1-2 eggs at a go, though they may come a few days apart, and there's no indication currently that sex of offspring can be reliably manipulated by temperature (unlike with some other reptiles). The eggs don't require special tending, but the babies should be moved to small aquaria, critter keepers, Rubbermaids, or anything else reasonable as soon as they're spotted. All they need in the basic baby enclosure is paper towel substrate (moistened), something to climb on, and something to hide in/under. The last two can both be provided with a bit of eggcrate. You can put multiple hatchlings in together as long as there's not a significantly bigger crestie in with them.

That probably answered some of your questions. I'll know more when I have successfully bred them, but for now that's a summary of what I've read from numerous sources including breeders, keepers, and the Rhacodactylus book. As far as I know, it's accurate, but I don't guarantee it.