A high priced FA like Johnny Hockey will not get this team to the playoffs. This team already has too many overpriced players, Hayes, JVR and Ristolainen all three are overpaid for what they bring to the team, not to mention Ellis.
Fletcher needs to focus on bringing in mid tier FAs to build the core of this team.
As for your question, yes I think they could afford to bring in JG but it would take some major moves and I personally think it would be a mistake.
But hey, this is Fletcher we are talking about so...........