In this case, because of the amount involved, the guidelines will call for a substantial prison sentence (well over 5 years). There is actually a loss table (again, we're talking about the "intended loss") that determines a certain number of points for the loss [1] (plus 7 points for the "base offense level"), and that number of points is then used with the sentencing table [2] to determine the sentence. The judge is of course free to depart up or down from the guideline sentence, but the sentencing range determined by those tables will be the starting point. The odds that he will receive no prison time at all after having gone to trial and lost are effectively zero. The judge will likely cut him some kind of break because nobody actually lost anything - his lawyers will argue that he showed remorse after the fact by eventually making his victims whole - but that will have a minor effect at best. My best guess, having watched many of these things play out, is 4-6 years.
[1] https://www.ussc.gov/guidelines/2016-guidelines-manual/2016-...
[2] https://www.ussc.gov/guidelines/2016-guidelines-manual/2016-...