You do not need an incubator for BD eggs, a warm room or sitting them on something slightly warm will do. Your biggest problem ( if you have no experience) is mixing the vermiculite and monitoring the moisture. This is something you need to be shown and not told, 98% of new people mix it too wet, and all you end up with is mouldy dead eggs, if it is mixed too dry the eggs will sink in, though this A; will not cause the eggs to die quickly like if they were too wet, and B; gives you plenty of time to add some more water. reptiles hatch fine from wrinkly eggs, which is how eggs are in wild conditions.