Hi Gabrielle,(posted 9391 days ago)for color negative printing I have only used room-temperature RA4- chemicals with Kodak Portra paper. I have been quite pleased with the results, but less pleased with my inability to repeat the results from one darkroom session to another. The same filtering never seems to work twice, it always requires test-strips for a color-beginner like me. I pour the liquid in ordinary trays and have a darkroom lamp that has a spectral sensitivity that doesn't affect the color- paper (a DUKA). The trays costs very little of course, the lamp is more expensive but less than your $200. The chemicals are not as cheap as the version that should be heated but I'm a hobbyist so all in all this is the cheapest solution. I use a special spray to get the oxygen out of the chemical cans once I have taken the amount needed in the trays, this way the chemicals live much longer. The chemicals diluted with water and used in the trays have to be wasted after each session anyway. Beware, use only a new tray for the developer, one that never has been in contact with black & white chemicals. The two other trays can (it seems) be your ordinary b&w trays. One tray, now that is cheap, isn't it!