Carbonfiber is at least 2-3 times the cost. If you have never used fiberglass I recommend playing with it first. Carbonfiber hoods are made from fiberglass molds.
To make a hood you´ll have to wetsand and polish it smooth and apply several coats of mold release wax. Any mods can be made prior to the mold using a stock hood but it still has to be the final shape and super smooth.
Spray the hood with gel coat, apply many, many coats of fiberglass for a mold and use wood supports or bracing to help maintain the shape and durability of the mold so it doesnt break while removing hoods. Once the fiberglass is dry, remove the hood from the mold. The mold will then need all imperfections removed and be polished to perfection. Coat with several layers of some type of mold release wax.
Apply gel coat, fiberglass (remember to add support, hood latch stuff and hinge area reinforcement with some sort of steel backing to bolt to). The bracing and such can also be added later but recommended before removing from the mold. Removing from the mold can be tough, usually alittle prying while pressurizing it with an air hose between the layer is most affective.
Without a mold to start from it would be nearly impossible to get the proper shape to fit the vehicle. The cost of making a hood can be much more costly than buying an existing carbonfiber hood. If the design is good and people are interested the cost can be offset by selling to others. But make sure the hoods will hold up if sold, it would´nt be good if hoods are breaking or flying off. Liability sucks.