Its not economically feasible because modern economics functions to create monetary value not tangible value for our society. You shouldn’t view it through the lense of what is “economically feasible” we should view it through the lense of what we should value as a society. Homelessness exists as a motivating coercive force to keep us buying into a system that would kick us to the curb if any of us were dealt a few bad hands in life. Its why our insurance is tied to our employment. The system is fundamentally broken for humanity to exsist inside of healthily, so much so that alot of us cant even imagine a society outside of it.