Kelly, I have a compact, 9-tray, 600w Excalibur that I've been quite
happy with for a couple of seasons (it's guaranteed for 10 years[!]).
The usable portion of the trays is 14" x 14" or just over 12 square
feet. It has a built-in timer and comes with a very good
instruction/recipe book. It's widely available on the internet.