Yeah, wages would be the problem, although we're both fucked if Hibs rekindle their interest.
FWIW in January we offered an undisclosed fee for him, while Hibs offered to loan him, United only wanted to loan him out but wanted a significant fee for doing so, which Hibs backed away from. So its hard to tell whether he'll be available or not, as I think they may change their manager in the Summer.