The only [probelm with Mini Nubians or Mini LaManchas is or any other type of Mini large dairy breed is the rebreeding as they can throw the larger type gene and you can have problems with it. I have some Mini Alpines and havent rebred them as I have read about the problems and nope not for me. I Nigerian dwarf goats and they kidd well and not many problems and are good milkers too. Either you want a large breed or a small 1 and you really dont want a mix as like I said the genetics can cause more problems when you cross breed them. You dont want a doe that is a Mini Nubian to throw a regular size Nubian as it wouldnt be good and you just never know. This is just my opinion I personally would go with 1 or the other. I love my full size LaMancha doe as she is so easy to milk and very laid back. The Nigerians are the same too but shorter and harder on my back to milk. I guess its just personal preference as to what you will be wanting. Yes the price is good but just look for a doe that has larger bones and good hocks as if the hocks tend to turn is she can have more kidding problems. I have learned this the hard way. Good luck with your choice.