I was not going to breed this year because of the cost. But I was looking at a cooler incubator and thought of a cheap alternative, well same concept. Just use a cooler with the T-stat I have and a zoo-medics heat pad.

l````Tl
l------l
l------l
lOOOOl
lxxxxx l

l = sides of cooler
O = water bottles
x = heat pad
T = T-stat