How much time will he do on assault and burglary charges - he got 20 yrs

Without knowing his prior criminal history, the facts of this case, was there violent or a weapon and the value of the crime, we have no idea what the minimum time served might be. By your question, if he got a 20-year bid in state, he's going to do at least 1/3 of that, if the judge stated he's eligible for parole. If there is no parole option, he will do 85% or 18 1/2 years.