Harder than many people think it is. They have to go through a cooling period, then after coming out of that they need to be power fed and put into a rain chamber. Then after you have eggs, you need somewhere to house potentaill hundreds of tadpoles. And the tads are ALOT of work just themselves. They all have to be fed, but not overfed or they will die, water changes daily, etc.
That being said, it would be well worth it if you can manage it all. Andrew from pollywog is one of the most well known breeders in tha world, and he will tell you that breeding them is literally like having a full time job just with that.