Q: We are going to start constructing 5 houses (and more later). Is it possible we can produce our own cellular concrete or something similar, cheap, good and sustainable? Can you advice us to find some production method for our own?

A: (Simon Stanfield) The short answer to your question is, yes.  Any of the "top three" of the volumetric manufacturers produce equipment that will do what you ask. My questions to you are this:    What materials do you plan to use?     Do you have a model mix design?     Are there building codes attached to materials production?     Do you have a  production demand (daily, hourly)?     How much can you budget for production? A typical truck mounted mobile concrete mixer with some kind of portable bulk cement storage can cost from $200,000 -- $250,000, U.S. funds.  I have seen too many poorly funded operations try to begin production, only to fail.  You must have consistency and capability built into your equipment to be effective.  The bargain machines do a very poor job and guarantee failure.  Thus, I wonder if five homes would be enough to pay for your investment. Additional consideration should be given to the types of materials you are thinking about.  Are you speaking of "Autoclaved Cellular Concrete," foamed mortar, or a simple "rubble" type of concrete with a lot of air voids in it?  I am using the term "concrete" to cover any hardened material produced by mixing cementitious stuff together. I have the advantage of living in the town where the leading manufacturer of mobile mixers is located.  I can provide introductions and schedule discussions if you would like to pursue this concept further.