Yup, with Fed on the slide they'll be looking for a new man.
And I bet they'll get him too, unless he feels obliged to stay with Adidas out of a sense of loyalty, or they offer him a better sponsorship deal.
He definitely isn't. Didn't he say the money he got for winning Wimbledon was "ridiculous"? He has no need to be greedy - he'll be rich beyond the dreams of avarice of most of us ( and Andy has been one of us) whatever he does now.
This article tells you what his estimated net worth was in April 2012 (£24m), before the gold medal, etc -http://www.therichest.com/celebnetworth/athletes/tennis/andy-murray-net-worth/
Put it this way, given his earnings since then, he could retire right now and be very comfortably off for the rest of his life without the need to go hunting for a job.