You could sedate the doughnuts when no one's looking and take it to the van across from Vinnie's house. Then take one of the men in the van's suits, walk in the front door and upstairs, look for a little room just to the right once at the top, hide inside and wait for Vinnie. Eventually he'll come inside the room for a moment to himself. Pounce..
Get the micro film off the wife however you want, dress as the clown or pool boy, or get the bottle from the shed and use it on the bbq, or if you're feeling sadistic, follow her until she goes in the pool room and drown her..
Sorry for all the detail, but i've played most levels in Blood Money dozens of times and found many paths through each.