I have the 9 tray Excalibur, go to their site or call and check for a refurbished one--save lots of money. Also get the sheets for making fruit leathers, I use them to dry banana puree that is so good. I keep the banana sheets in the freezer and it is a great snack, they can also be used to make banana bread.
I buy the frozen mixed veggies on sale and then dry them for soups. I make yogurt all the time, use 1 gallon milk each time and takes about 5-6 hours in the Excalibur.
Jan