Certainly it’s a leap of faith on Kieboom and he may prove to not be ready. But, if the team signs Donaldson, it’s clear that they aren’t paying anyone to start at 2nd. Kieboom has the potential to be better than some decent money free agents, and he’ll be extremely cheap. We need him, at his salary, to take hold of one of those open infield spots. Then use available funds for the pen.
if Cabrera were willing to slip into a role where he'd be a backup with about 300 PAs pencilled in before injuries, then I think he's moving into a "must sign" position. Perhaps you put in some incentives for appearances or PAs. He'd be Kieboom insurance, and capable of playing around the infield.
Thames is interesting too. I would not mind going into next year with Thames and RZ at 1st, Turner at SS, and some combo of Cabrera, Kendrick, and Kieboom covering 2d and 3d. I'd still be looking for another 3B, but it would not have to be a star.