Menez's on €3.4m net now according to
http://www.tsmplug.com/, if he comes for free he might be earning close to Pirlo or Vidal. the alternative is renew Giovinco who imo is similar level winger and backup, currently eaning around €1.5m net, plus if Giovinco is renewed his amortization cost would cost down from around €3.5m to €1.2m, that will hopefully go to the transfer budget (add about €10m to transfer fees that can be amortized over 4 or 5 years).
I much rather Juve go big on a winger and get a promising youngster for backup than pay washed up players like Menez wages like that.