Of course he could double job for the rest of the season. How many international breaks are, 2 or 3? and the majority of our 1st team would be away on intl duty and the coaches could cover. It is a suggested interim solution not a long term one. Managers that have managed club and country in the past include: Hiddink, Sir Alex, Advocaat, Terim, Herrera, Rinus Michels and Slutsky.
Could he continue with Italy until after the WC and do both jobs in the interim. International football is hardly a taxing full time job. For the right manager I would not have a problem with this. Its not like we will ever have a game on when there is an international on and most of our players would be on international duty anyway so they wouldn't miss training