I have a chance to buy a Brinsea Octagon 20 Eco AND turner accessory for $163 shipped. Also, the Mini-Advance is on sale right now for $119 - less money but fewer eggs. Since this will be used in the classroom and I probably wouldn't do more than a dozen eggs with the kids anyway even if I had the bigger one, I was thinking of spending less money.... BUT there would be more room for the chicks to move around if there was an early or late hatch over a weekend. I work 45 min. from my school and don't have a gate or building key, only my classroom key so there would be a chance the babies would be all alone until Monday a.m. In your opinion, should I spend more money and have more room for eggs and chicks, or spend less and be forced to do fewer eggs?? Money is a slight issue as I will be receiving a small amount of funding, but I know I shouldn't spend it all on this project. What to do, what to do!