The question is what is the club worth to SISU (or their investors). From what I can tell the club is in a lot of debt (10's of millions) to SISU, so they can claim on their balance sheet they have an "asset" worth £40m (or whatever the debt to them is). Common sense would tell you that the club isn't worth that amount of money, so to "prove" that it is to their auditors they'll want the club to be paying back a chunk every year (a million or two perhaps).
So to speculate, I reckon their aim is to reduce the club's costs significantly, and make sure that it's able to repay a chunk of the debt every year, probably by selling whatever assets come along (Wilson, Maddison, Ryton training ground, etc). When the debt is payed off (or close to paid off) they'll sell up.
This is a pretty gloomy assessment as it means we're heading for a 15+ year exercise in SISU drawing blood from a stone. The only positive I can see is it means it's in their interests to at least have the club in a position where they can take big enough repayments on the debt to prove it's actually worth what they say it's worth. So they can't completely neglect the on-pitch side (though they won't be busting a gut to get us promoted).