Great feedback here, y'all. Thank you. Su, I saw that same setup too on a couple videos. They looked pretty promising and I'm guessing they buried it to get below the frost line. The only thing I didn't like about them was that they didn't have a filter for grease and such. Although I'm sure one could be fabricated.
Jd, do you know if that system would ever require you to replace the peat moss or how much maintenance it would require?
R Scott, my wife sheds like nobody's business. Although I don't mind because her hair is quite gorgeous. =) I'll have to look into the grease trap setups. Since I have the money, I think I might just go with the kit, but we'll see.