My leopard geckos are going to breed and I cannot afford an incubator so I am going to make a homeade one but I can't afford another heat pad either. Can I just make the incubator and then put it in a place in the cage where the other geckos cannot reach it but I will still be heated by the heat pad? It will still be filled with vermiculite and it will be sprayed and humidity an temperature will be fine but can I do this? If not, what do I do?