Depends on who you are offering the money to, if they will take it, if you have to overpay (history says yes), if they fill a position of need, and if you want that cap space to be the only tool for adding talent besides the $2.5M exception.
http://www.hoopsworld.com/2013-nba-free-agents
From the free agents, who is worth $10M? I think Millsap. But then what happens to ED/Amir? At SF, I don't see anyone worth $10M. I like Wright though. What about backup PG? If you go SG what happens to DD or Ross? C? Again, what about ED/Amir/ and now JV?