Is it possible to lift a wakeboat with slings?

We're considering putting in an offer on a lake house that backs up to a small canal that feeds into a larger cove. And it's pretty shallow back there (about 2.5") and the existing boat slip/lift is set up w/slings and has about a 21/22 ft deck boat on it.

Would I have to change the slings out for a cradle? or can slings work?