E-6 processing is easy enough, but it is tedious. Really tight temperature control is only needed in the first developer. The other steps go to completion and are a bit more relaxed. Cost is not too bad, but the prices for kits recently almost doubled. The Tetnal 3 bath kit is now about US$77 for the 5 liter size. The Kodak 6 bath kit is still about US$45 for that size, but shipping can be a problem. I get about three small tanks of film processed per liter in my Jobo. That works out to $1.50 per 120 roll with the Kodak kit if I aways process a full tank.