Very interesting way to think about the lifestyle of liquidarianism.  I practice liquidarianism with intermittent Dry Fasting - no water or food.  I then do long water fasts at least twice a year at 15 days each.  This equals about 5 months a year that I take in Liquid carrots, apples, lettuce, some pure green tea and some oranges for treat.  My motivation for this lifestyle might be different then others.  My motivation is Life Extension; I started the journey from the scientific research side of it.  I found that food is the main cause of aging in the human organism.  From there I have been compiling research to find the best possible methods to reduce the ever compounding damaging effects of food and increase the human life span from the very low max of 120 years or so.  To date I have found that liquidarianism every second day with Dry fasting on the other combined with long water fasting (healing fasting) is a powerful step in that direction.  It has taken me over a year to get to where I am now and I am becoming more and more comfortable with the lifestyle.  It is very nice to see others are also living a similar lifestyle out there and I'm sure you will see many healthy years of life.  On another note, I do believe that breatharian might be possible; however I too have not corresponded with any that truly practice it as it should be.  True breatharians digestive organs would in-active and putting in something like cheese cake would cause great damage.