I built my 14 tub birthing rack for a good price. I paid 11.00 for the 2 by 4s (I split them on a table saw) then 55 for the 14 large pet mate litter pans, around 20.00 for the mesh, and a 4 foot by 2 foot piece of plywood for the gliders which was 6.00. So I spent around 90.00 I didn't use a auto system even though I use them for my breeding racks. Reason being is rats are worth a lot around here and losing a tubs with two female litters would cost me around 60.00 lol. Plus I had my first floods around a month ago and I was devastated I am out there checking on my rats like 4 to 5 time a day and it still flooded them overnight. Honestly I would even consider going back to bottles the watering system has became a pain in my but, keeping up with the maintenance (flushing lines, cleaning valves).