I found another possible easy way for soylent. In fact it’s almost soylent as it is. I stumbled into this site:
They offer meal replacement, e.g. powder shakes, for dieting and 3 of their products are suppose to give you “a 100% replacement of vitamins and minerals”. Since I’m not interested in living on 600 kcal a day it should be fairly easy to complement with carbs, fat and protein for your complete diet. This would of course be a more expensive option but far more convenient and easy to start out with. Also, this is well tested with their costumers and put together according to guidelines, etc.
What’s your comment?!