Looking at it simplisticallyis all mate.If I knew what leveraged actually meant, or rather the implications of it anyrate, I would offer an opinion.
Seems to have been not too shabby at United.
*cue leeds/portsmouthetc etc*
Thing with United is they did it and are one of the leading brands in the world with mega-income outside of football so could heap debt onto the club no problem.
What concerns me is that is FFP has kicked in albeit somewhat diluted so realistically profits need to be as high as possible in order to improve squad and wages and as you mention is what has happened to other clubs where the owners have laden them with debt. Remember our patron Saints Hicks and Gillett who nearly brought the RS down.
Implications are higher amounts of interest paid due to higher debt and weaker balance sheet again due to higher debt.