I have read a lot about it. I am not in the USA so things can be more expensive here. Ilfostop and Rapid Fixer runs out to about $35US together. A powder developer like Perceptol is $10US that makes 1L undiluted. A liquid developer is about $35US. As a newbie hobbyist, I only have2 rolls of Ilford HP5+. Of course it's uneconomical to purchase $45-70US of chemicals to process (2) rolls of film. So how many do you suggest a hobbyist to do? Ie., collect up. Noting that many of them don't even shoot a good few rolls per month. I may run a roll every month or two, if I go on a trip I may shoot more. But I shoot color film as well. In addition, the Ilford Datasheet notes that chemicals last 6 - 1 months (full bottles - half bottles). The exception being liquid developers may last 36 - 24 months (DD-XX). But given the more expensive cost of liquid developers I may stick with powders and simply collect my film up and develop. Once a year? Thanks.