well for 1theres nothing wrong at all with her leaving cornsnakes together all the time her husbandry on that aspect is just fine ..blackcrystal22----and knows they are male and female, both are adults and have bred before. I don't want to hear about her husbandry problems, because I disagree with them too, but she is very stubborn and the animals are healthy and eating fine, just with some husbandry hiccups that most wouldn't agree with.
as for a quick incubator and temps the temps need to be between 84-88 degrees(safe area)..
as for incubator like someone said if she has a closet that stays in those temps she can just put them in a container and put that inside a 10 gallon fish tank and put it in the closet with a medium size bowl of water and a piece of glass or plexi glass over the top of it with 1 sided only opened about 1/2 inch for oxygen flow .
i have produced many clutches and so have other breeders i know doing it this way . its quick ,effective ,and cheap to use ..
now if the temps fall below 84 a heat light in the closet itself will add proper heat to the whole closet (not on the tank) . if it gets hotter then 88 then vice versa stick a small fan in the closet to circulate the air and cool it down ..